hw/ppc/ppc440_uc: Remove dead l2sram_update_mappings()

Apparently l2sram_update_mappings() bit-rotted over time,
when defining MAP_L2SRAM we get:

  hw/ppc/ppc440_uc.c:83:17: error: no member named 'isarc' in 'struct ppc4xx_l2sram_t'
      if (l2sram->isarc != isarc ||
          ~~~~~~  ^
  hw/ppc/ppc440_uc.c:84:18: error: no member named 'isacntl' in 'struct ppc4xx_l2sram_t'
          (l2sram->isacntl & 0x80000000) != (isacntl & 0x80000000)) {
           ~~~~~~  ^
  hw/ppc/ppc440_uc.c:85:21: error: no member named 'isacntl' in 'struct ppc4xx_l2sram_t'
          if (l2sram->isacntl & 0x80000000) {
              ~~~~~~  ^
  hw/ppc/ppc440_uc.c:88:50: error: no member named 'isarc_ram' in 'struct ppc4xx_l2sram_t'
                                          &l2sram->isarc_ram);
                                           ~~~~~~  ^
  hw/ppc/ppc440_uc.c:93:50: error: no member named 'isarc_ram' in 'struct ppc4xx_l2sram_t'
                                          &l2sram->isarc_ram);
                                           ~~~~~~  ^
  hw/ppc/ppc440_uc.c:96:17: error: no member named 'dsarc' in 'struct ppc4xx_l2sram_t'
      if (l2sram->dsarc != dsarc ||
          ~~~~~~  ^
  hw/ppc/ppc440_uc.c:97:18: error: no member named 'dsacntl' in 'struct ppc4xx_l2sram_t'
          (l2sram->dsacntl & 0x80000000) != (dsacntl & 0x80000000)) {
           ~~~~~~  ^
  hw/ppc/ppc440_uc.c:98:21: error: no member named 'dsacntl' in 'struct ppc4xx_l2sram_t'
          if (l2sram->dsacntl & 0x80000000) {
              ~~~~~~  ^
  hw/ppc/ppc440_uc.c:100:52: error: no member named 'dsarc' in 'struct ppc4xx_l2sram_t'
              if (!(isacntl & 0x80000000) || l2sram->dsarc != isarc) {
                                             ~~~~~~  ^
  hw/ppc/ppc440_uc.c:103:54: error: no member named 'dsarc_ram' in 'struct ppc4xx_l2sram_t'
                                              &l2sram->dsarc_ram);
                                               ~~~~~~  ^
  hw/ppc/ppc440_uc.c:111:54: error: no member named 'dsarc_ram' in 'struct ppc4xx_l2sram_t'
                                              &l2sram->dsarc_ram);
                                               ~~~~~~  ^

Remove that dead code.

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/ppc/ppc440_uc.c

@@ -73,46 +73,6 @@ typedef struct ppc4xx_l2sram_t {
     uint32_t isram0[11];
 } ppc4xx_l2sram_t;
 
-#ifdef MAP_L2SRAM
-static void l2sram_update_mappings(ppc4xx_l2sram_t *l2sram,
-                                   uint32_t isarc, uint32_t isacntl,
-                                   uint32_t dsarc, uint32_t dsacntl)
-{
-    if (l2sram->isarc != isarc ||
-        (l2sram->isacntl & 0x80000000) != (isacntl & 0x80000000)) {
-        if (l2sram->isacntl & 0x80000000) {
-            /* Unmap previously assigned memory region */
-            memory_region_del_subregion(get_system_memory(),
-                                        &l2sram->isarc_ram);
-        }
-        if (isacntl & 0x80000000) {
-            /* Map new instruction memory region */
-            memory_region_add_subregion(get_system_memory(), isarc,
-                                        &l2sram->isarc_ram);
-        }
-    }
-    if (l2sram->dsarc != dsarc ||
-        (l2sram->dsacntl & 0x80000000) != (dsacntl & 0x80000000)) {
-        if (l2sram->dsacntl & 0x80000000) {
-            /* Beware not to unmap the region we just mapped */
-            if (!(isacntl & 0x80000000) || l2sram->dsarc != isarc) {
-                /* Unmap previously assigned memory region */
-                memory_region_del_subregion(get_system_memory(),
-                                            &l2sram->dsarc_ram);
-            }
-        }
-        if (dsacntl & 0x80000000) {
-            /* Beware not to remap the region we just mapped */
-            if (!(isacntl & 0x80000000) || dsarc != isarc) {
-                /* Map new data memory region */
-                memory_region_add_subregion(get_system_memory(), dsarc,
-                                            &l2sram->dsarc_ram);
-            }
-        }
-    }
-}
-#endif
-
 static uint32_t dcr_read_l2sram(void *opaque, int dcrn)
 {
     ppc4xx_l2sram_t *l2sram = opaque;
@@ -193,7 +153,6 @@ static void dcr_write_l2sram(void *opaque, int dcrn, uint32_t val)
         /*l2sram->isram1[dcrn - DCR_L2CACHE_BASE] = val;*/
         break;
     }
-    /*l2sram_update_mappings(l2sram, isarc, isacntl, dsarc, dsacntl);*/
 }
 
 static void l2sram_reset(void *opaque)
@@ -203,7 +162,6 @@ static void l2sram_reset(void *opaque)
     memset(l2sram->l2cache, 0, sizeof(l2sram->l2cache));
     l2sram->l2cache[DCR_L2CACHE_STAT - DCR_L2CACHE_BASE] = 0x80000000;
     memset(l2sram->isram0, 0, sizeof(l2sram->isram0));
-    /*l2sram_update_mappings(l2sram, isarc, isacntl, dsarc, dsacntl);*/
 }
 
 void ppc4xx_l2sram_init(CPUPPCState *env)