kmod: remove redundant -mcmodel=large on ppc64le

In PR #1205, Kamalesh reports:

  ... I see that the -mcmodel=large flag is being passed twice with
  KBUILD_CFLAGS_MODULE set:

  gcc -Wp,-MMD,/root/.kpatch/tmp/patch/.livepatch-meminfo.mod.o.d ............ -mcmodel=medium .... -I/root/kpatch/kmod/patch -mcmodel=large -fplugin=/root/kpatch/kpatch-build/gcc-plugins/ppc64le-plugin.so ... -DMODULE -mno-save-toc-indirect -mcmodel=large -mcmodel=large -DKBUILD_BASENAME='"livepatch_meminfo.mod"' -DKBUILD_MODNAME='"livepatch_meminfo"' -D__KBUILD_MODNAME=kmod_livepatch_meminfo -c -o /root/.kpatch/tmp/patch/livepatch-meminfo.mod.o /root/.kpatch/tmp/patch/livepatch-meminfo.mod.c.

  I loaded the module built without the KBUILD_CFLAGS_MODULE +=
  -mcmodel=large flag and seems to okay. I guess, we can remove the arch
  specific flag from the Makefile.

Suggested-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>

Author: joe-lawrence

kmod/patch/Makefile

@@ -2,14 +2,6 @@ KPATCH_BUILD ?= /lib/modules/$(shell uname -r)/build
 KPATCH_MAKE = $(MAKE) -C $(KPATCH_BUILD) M=$(PWD) CFLAGS_MODULE='$(CFLAGS_MODULE)'
 LDFLAGS += $(KPATCH_LDFLAGS)
 
-# ppc64le kernel modules are expected to compile with the
-# -mcmodel=large flag.  This enables 64-bit relocations
-# instead of a 32-bit offset from the TOC pointer.
-PROCESSOR = $(shell uname -m)
-ifeq ($(PROCESSOR), ppc64le)
-CFLAGS_MODULE += -mcmodel=large
-endif
-
 obj-m += $(KPATCH_NAME).o
 ldflags-y += -T $(src)/kpatch.lds
 targets += kpatch.lds