util/crossgcc: Add ppc64el support

Change-Id: I619f7c3cef7f0aaa6fccb3d52f2ac1f6ace6d0d6
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/12818
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index fad40bf..31db9cb 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -587,16 +587,17 @@
 printversion
 
 case "$TARGETARCH" in
-	x86_64-elf)	;;
-	x86_64*)	TARGETARCH=x86_64-elf;;
-	i386-elf)	;;
-	i386-mingw32)	;;
-	mipsel-elf)	;;
-	riscv-elf)	;;
-	i386*)		TARGETARCH=i386-elf;;
-	arm*)		TARGETARCH=armv7-a-eabi;;
-	aarch64*)	TARGETARCH=aarch64-elf;;
-	*)		printf "${red}WARNING: Unsupported architecture $TARGETARCH.${NC}\n\n"; ;;
+	x86_64-elf)		;;
+	x86_64*)		TARGETARCH=x86_64-elf;;
+	i386-elf)		;;
+	i386-mingw32)		;;
+	mipsel-elf)		;;
+	riscv-elf)		;;
+	powerpc64le-linux-gnu)	;;
+	i386*)			TARGETARCH=i386-elf;;
+	arm*)			TARGETARCH=armv7-a-eabi;;
+	aarch64*)		TARGETARCH=aarch64-elf;;
+	*)			printf "${red}WARNING: Unsupported architecture $TARGETARCH.${NC}\n\n"; ;;
 esac
 
 # Figure out which packages to build