[PATCH] Enable USE_FAST_LOG on powerpc64

Similar to x86_64, enable USE_FAST_LOG on powerpc64. Testing on POWER9
shows an 8% speed up.

Signed-off-by: Anton Blanchard <[email protected]>

---
diff -ru lame-3.100~/configure.in lame-3.100/configure.in
--- lame-3.100~/configure.in	2017-08-16 01:16:31.000000000 +1000
+++ lame-3.100/configure.in	2018-07-12 08:53:07.411502208 +1000
@@ -710,6 +710,11 @@
 	# The following should not get enabled on a G5. HOWTO check for a G5?
 	AC_DEFINE(USE_FAST_LOG, 1, faster log implementation with less but enough precission)
 	;;
+powerpc64*)
+	CPUTYPE="no"
+
+	AC_DEFINE(USE_FAST_LOG, 1, faster log implementation with less but enough precission)
+	;;
 *)
 	CPUTYPE="no"
 	;;

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