s390/uaccess: Define INLINE_COPY_FROM_USER and INLINE_COPY_TO_USER

s390/uaccess: Define INLINE_COPY_FROM_USER and INLINE_COPY_TO_USER

Inline copy_from_user() and copy_to_user(). With the shortened inline
assemblies of raw_copy_to_user() and raw_copy_from_user() the additional
kernel text size is acceptable, considering that this avoids function
calls on hot paths.

This increases the kernel text size by ~90kb (defconfig, gcc 14.2.0):

add/remove: 13/4 grow/shrink: 650/14 up/down: 93484/-3254 (90230)

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>