powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info
powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info

Use DEFINE_PER_CPU to allocate thread_info statically instead of kmalloc().
This can avoid introducing more memory check codes.

Signed-off-by: Tiejun Chen <86aa98d1ce79e67acc7976f5603381a6ff7f6a6e@windriver.com>
[b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com: wrapped long line]
Signed-off-by: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs