ARM: 6883/1: ptrace: Migrate to regsets framework

This patch migrates the implementation of the ptrace interface for
the core integer registers, legacy FPA registers and VFP registers
to use the regsets framework.

As an added bonus, all this stuff gets included in coredumps
at no extra cost.  Without this patch, coredumps contained no
VFP state.

Third-party extension register sets (iwmmx, crunch) are not migrated
by this patch, and continue to use the old implementation;
these should be migratable without much extra work.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Will Deacon <Will.Deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index c3cd875..0e9ce8d 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -108,6 +108,7 @@
 int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
 #define ELF_CORE_COPY_TASK_REGS dump_task_regs
 
+#define CORE_DUMP_USE_REGSET
 #define ELF_EXEC_PAGESIZE	4096
 
 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical