ANDROID: gki_defconfig: workaround to enable configs

We're interested in following configs, which can't be selected by
themselves:
CONFIG_GPIOLIB_IRQCHIP
CONFIG_GENERIC_PINCONF
CONFIG_PINCONF
CONFIG_PINMUX
CONFIG_GENERIC_TRACER
CONFIG_MFD_CORE

As a workaround, enable configs that select the above:
CONFIG_PINCTRL_AMD
CONFIG_MFD_ACT8945A
CONFIG_FUNCTION_TRACER

Bug: 135666008
Bug: 135247530
Change-Id: If348f54fc11ab2c35ed2241d50327d8ce3b0b72e
Signed-off-by: Tri Vo <trong@google.com>