[POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S

Eliminate needless invocation of the SYNC macro (which always evaluates to
nothing on BookE) from head_fsl_booke.S (for both arch/ppc & arch/powerpc).
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/head_fsl_booke.S

@@ -892,7 +892,6 @@ load_up_spe:
 	REST_GPR(9, r11)
 	REST_GPR(12, r11)
 	lwz	r11,GPR11(r11)
-	SYNC
 	rfi
 
 /*
@@ -956,7 +955,6 @@ _GLOBAL(giveup_altivec)
 _GLOBAL(giveup_spe)
 	mfmsr	r5
 	oris	r5,r5,MSR_SPE@h
-	SYNC
 	mtmsr	r5			/* enable use of SPE now */
 	isync
 	cmpi	0,r3,0

arch/ppc/kernel/head_fsl_booke.S

@@ -892,7 +892,6 @@ load_up_spe:
 	REST_GPR(9, r11)
 	REST_GPR(12, r11)
 	lwz	r11,GPR11(r11)
-	SYNC
 	rfi
 
 /*
@@ -956,7 +955,6 @@ _GLOBAL(giveup_altivec)
 _GLOBAL(giveup_spe)
 	mfmsr	r5
 	oris	r5,r5,MSR_SPE@h
-	SYNC
 	mtmsr	r5			/* enable use of SPE now */
 	isync
 	cmpi	0,r3,0