pinctrl: berlin: Make berlin pinctrl driver visible if COMPILE_TEST=y

It is good to allow berlin pinctrl driver to build with COMPILE_TEST, so
make the it menu visible when compile-testing.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Acked-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/berlin/Kconfig

-if ARCH_BERLIN
+if (ARCH_BERLIN || COMPILE_TEST)
 
 config PINCTRL_BERLIN
 	bool