remove 32bit from x86_64 and add big-endian ppc64

Signed-off-by: Toshaan Bharvani <toshaan@powerel.org>

SPECS/gcc.spec

@@ -107,10 +107,10 @@
 %ifarch sparc64
 %global multilib_32_arch sparcv9
 %endif
-%ifarch ppc64 ppc64p7
+%ifarch ppc64p7
 %global multilib_32_arch ppc
 %endif
-%ifarch x86_64
+%ifarch i686
 %global multilib_32_arch i686
 %endif
 Summary: Various compilers (C, C++, Objective-C, ...)
@@ -1041,7 +1041,7 @@ CONFIGURE_OPTS="\
 %ifarch sparc sparcv9
 	--host=%{gcc_target_platform} --build=%{gcc_target_platform} --target=%{gcc_target_platform} --with-cpu=v7
 %endif
-%ifarch ppc ppc64 ppc64p7
+%ifarch ppc ppc64p7
 %if 0%{?rhel} >= 7
 	--with-cpu-32=power7 --with-tune-32=power7 --with-cpu-64=power7 --with-tune-64=power7 \
 %endif
@@ -1049,6 +1049,13 @@ CONFIGURE_OPTS="\
 	--with-cpu-32=power4 --with-tune-32=power6 --with-cpu-64=power4 --with-tune-64=power6 \
 %endif
 %endif
+%ifarch ppc64
+%if 0%{?rhel} == 9
+	--with-cpu-32=%{cpuarch} --with-tune-32=%{cpuarch} --with-cpu-64=%{cpuarch} --with-tune-64=%{cpuarch} \
+%else
+	--with-cpu-32=power8 --with-tune-32=power8 --with-cpu-64=power8 --with-tune-64=power8 \
+%endif
+%endif
 %ifarch ppc64le
 %if 0%{?rhel} == 9
 	--with-cpu-32=%{cpuarch} --with-tune-32=%{cpuarch} --with-cpu-64=%{cpuarch} --with-tune-64=%{cpuarch} \