target/riscv: access cfg structure through DisasContext

The Zb[abcs] support code still uses the RISCV_CPU macros to access
the configuration information (i.e., check whether an extension is
available/enabled).  Now that we provide this information directly
from DisasContext, we can access this directly via the cfg_ptr field.

Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220202005249.3566542-5-philipp.tomsich@vrull.eu>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/insn_trans/trans_rvb.c.inc

@@ -19,25 +19,25 @@
  */
 
 #define REQUIRE_ZBA(ctx) do {                    \
-    if (!RISCV_CPU(ctx->cs)->cfg.ext_zba) {      \
+    if (ctx->cfg_ptr->ext_zba) {                 \
         return false;                            \
     }                                            \
 } while (0)
 
 #define REQUIRE_ZBB(ctx) do {                    \
-    if (!RISCV_CPU(ctx->cs)->cfg.ext_zbb) {      \
+    if (ctx->cfg_ptr->ext_zbb) {                 \
         return false;                            \
     }                                            \
 } while (0)
 
 #define REQUIRE_ZBC(ctx) do {                    \
-    if (!RISCV_CPU(ctx->cs)->cfg.ext_zbc) {      \
+    if (ctx->cfg_ptr->ext_zbc) {                 \
         return false;                            \
     }                                            \
 } while (0)
 
 #define REQUIRE_ZBS(ctx) do {                    \
-    if (!RISCV_CPU(ctx->cs)->cfg.ext_zbs) {      \
+    if (ctx->cfg_ptr->ext_zbs) {                 \
         return false;                            \
     }                                            \
 } while (0)