powerpc: Convert to %r for all GPR usage

#define	cr7	7

/* General Purpose Registers (GPRs) */

#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

/*

 * General Purpose Registers (GPRs)

 *

 * The lower case r0-r31 should be used in preference to the upper

 * case R0-R31 as they provide more error checking in the assembler.

 * 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

/* Floating Point Registers (FPRs) */