watchdog: pic32-wdt: allow driver to be compiled on all architectures with COMPILE_TEST

watchdog: pic32-wdt: allow driver to be compiled on all architectures with COMPILE_TEST

This driver currently only supports builds against a PIC32 target, or
with COMPILE_TEST on MIPS. Now that commit 5aa5879eeebb ("watchdog:
pic32-wdt: update include to use pic32.h from platform_data") is merged,
it's possible to compile this driver on other architectures.

To avoid future breakage of this driver in the future, let's update the
Kconfig so that it can be built with COMPILE_TEST enabled on all
architectures.

Signed-off-by: Brian Masney <bmasney@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20260222-watchdog-pic32-v1-1-a2538aa528d1@redhat.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>