pinctrl: at91: allow building the module with COMPILE_TEST=y

Extend the build coverage by allowing to build the module with
COMPILE_TEST enabled. We can do this as the driver doesn't depend on any
architecture-specific bits.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/20250424-gpiochip-set-rv-pinctrl-part2-v1-8-504f91120b99@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/Kconfig

@@ -103,8 +103,7 @@ config PINCTRL_AS3722
 
 config PINCTRL_AT91
 	bool "AT91 pinctrl driver"
-	depends on OF
-	depends on ARCH_AT91
+	depends on (OF && ARCH_AT91) || COMPILE_TEST
 	select PINMUX
 	select PINCONF
 	select GPIOLIB