arch-powerpc: Use -maltivec in compiler flags if altivec is in tune features

(From OE-Core rev: 80ecd2c42e9e1215de403ef9b69ab290f26cd750)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/machine/include/powerpc/arch-powerpc.inc

@@ -26,6 +26,7 @@ TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'fpu-soft', ' -msoft-float
 TARGET_FPU .= "${@bb.utils.contains('TUNE_FEATURES', 'fpu-soft', 'soft', '', d)}"
 
 TUNEVALID[altivec] = "Altivec"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'altivec', ' -maltivec', '', d)}"
 
 # Basic tune definitions
 AVAILTUNES += "powerpc powerpc-nf powerpcle powerpcle-nf"