leds: leds-gpio-flash: add led gpio flash driver in def config
leds: leds-gpio-flash: add led gpio flash driver in def config

the led gpio flash driver is new, so need add it in defconfig
to compile it.

Change-Id: I5080f4aeefcd1353353841dd772778f7ef964c29
Signed-off-by: Tingting Yang <dc3df3e80718afd98aa4be16ba8dadfe50646070@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas