FRV: Fix incorrect symbol in copy_thread() [ver #2]

FRV: Fix incorrect symbol in copy_thread() [ver #2]

Fix an incorrect symbol in copy_thread():

	arch/frv/kernel/process.c: In function 'copy_thread':
	arch/frv/kernel/process.c:197: error: 'chilregs' undeclared (first use in this function)
	arch/frv/kernel/process.c:197: error: (Each undeclared identifier is reported only once
	arch/frv/kernel/process.c:197: error: for each function it appears in.)
m

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>