powerpc/ppc_asm: use plain numbers for registers

This is dumb but makes the llvm integrated assembler happy.
ClangBuiltLinux#764

Signed-off-by: Daniel Axtens <dja@axtens.net>

arch/powerpc/include/asm/ppc_asm.h

@@ -509,38 +509,38 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
  * Use R0-31 only when really nessesary.
  */
 
-#define	r0	%r0
-#define	r1	%r1
-#define	r2	%r2
-#define	r3	%r3
-#define	r4	%r4
-#define	r5	%r5
-#define	r6	%r6
-#define	r7	%r7
-#define	r8	%r8
-#define	r9	%r9
-#define	r10	%r10
-#define	r11	%r11
-#define	r12	%r12
-#define	r13	%r13
-#define	r14	%r14
-#define	r15	%r15
-#define	r16	%r16
-#define	r17	%r17
-#define	r18	%r18
-#define	r19	%r19
-#define	r20	%r20
-#define	r21	%r21
-#define	r22	%r22
-#define	r23	%r23
-#define	r24	%r24
-#define	r25	%r25
-#define	r26	%r26
-#define	r27	%r27
-#define	r28	%r28
-#define	r29	%r29
-#define	r30	%r30
-#define	r31	%r31
+#define	r0	0
+#define	r1	1
+#define	r2	2
+#define	r3	3
+#define	r4	4
+#define	r5	5
+#define	r6	6
+#define	r7	7
+#define	r8	8
+#define	r9	9
+#define	r10	10
+#define	r11	11
+#define	r12	12
+#define	r13	13
+#define	r14	14
+#define	r15	15
+#define	r16	16
+#define	r17	17
+#define	r18	18
+#define	r19	19
+#define	r20	20
+#define	r21	21
+#define	r22	22
+#define	r23	23
+#define	r24	24
+#define	r25	25
+#define	r26	26
+#define	r27	27
+#define	r28	28
+#define	r29	29
+#define	r30	30
+#define	r31	31
 
 
 /* Floating Point Registers (FPRs) */