power: reset: convert to CFLAGS_MODULE

Upstream has removed the support for EXTRA_CFLAGS in [1]. The driver
here is converted to use CFLAGS_MODULE as a direct replacement. No
functional changes expected from this patch.

Bug: 412122604
Link: https://git.kernel.org/torvalds/c/e966ad0edd00 [1]
Change-Id: Iadfc492cef5ab219467f9df739f4c66eabd1a1c3
Signed-off-by: Carlos Llamas <[email protected]>
1 file changed