powerpc: Removed duplicated include in stacktrace.c
powerpc: Removed duplicated include in stacktrace.c

Removed duplicated include file <linux/module.h> in
arch/powerpc/kernel/stacktrace.c.

Signed-off-by: Huang Weiyi <3747a8217f9c255c8b609f0f2e71d2a8804c1b96@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas