powerpc/kernel: Open code HMT_MEDIUM_LOW_HAS_PPR

HMT_MEDIUM_LOW_HAS_PPR is only used in once place, open code it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/ppc_asm.h

@@ -418,11 +418,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
  * PPR restore macros used in entry_64.S
  * Used for P7 or later processors
  */
-#define HMT_MEDIUM_LOW_HAS_PPR						\
-BEGIN_FTR_SECTION_NESTED(944)						\
-	HMT_MEDIUM_LOW;							\
-END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,944)
-
 #define SET_DEFAULT_THREAD_PPR(ra, rb)					\
 BEGIN_FTR_SECTION_NESTED(945)						\
 	lis	ra,INIT_PPR@highest;	/* default ppr=3 */		\

arch/powerpc/kernel/entry_64.S

@@ -223,7 +223,11 @@ END_FTR_SECTION_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
 
 	beq-	1f
 	ACCOUNT_CPU_USER_EXIT(r11, r12)
-	HMT_MEDIUM_LOW_HAS_PPR
+
+BEGIN_FTR_SECTION
+	HMT_MEDIUM_LOW
+END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
+
 	ld	r13,GPR13(r1)	/* only restore r13 if returning to usermode */
 1:	ld	r2,GPR2(r1)
 	ld	r1,GPR1(r1)