powerpc/process: Remove useless #ifdef CONFIG_ALTIVEC

cpu_has_feature(CPU_FTR_ALTIVEC) returns false when CONFIG_ALTIVEC is
not set.

There is no need to enclose the test in an #ifdef CONFIG_ALTIVEC.
Remove it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/03ba6b52344ca7c336df2bc6e3d31d736c804ae2.1597643221.git.christophe.leroy@csgroup.eu

arch/powerpc/kernel/process.c

@@ -409,10 +409,8 @@ static int __init init_msr_all_available(void)
 #ifdef CONFIG_PPC_FPU
 	msr_all_available |= MSR_FP;
 #endif
-#ifdef CONFIG_ALTIVEC
 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
 		msr_all_available |= MSR_VEC;
-#endif
 	if (cpu_has_feature(CPU_FTR_VSX))
 		msr_all_available |= MSR_VSX;
 #ifdef CONFIG_SPE
@@ -446,10 +444,8 @@ void giveup_all(struct task_struct *tsk)
 	if (usermsr & MSR_FP)
 		__giveup_fpu(tsk);
 #endif
-#ifdef CONFIG_ALTIVEC
 	if (usermsr & MSR_VEC)
 		__giveup_altivec(tsk);
-#endif
 #ifdef CONFIG_SPE
 	if (usermsr & MSR_SPE)
 		__giveup_spe(tsk);