ARM: config: multi_v7: Update it for Keystone defconfig

Sync multi_v7_defconfig with the current keystone_defconfig with
recent updates.

 CONFIG_PCI_KEYSTONE=y
 CONFIG_MTD_NAND_DAVINCI=y
 CONFIG_I2C_DAVINCI=y
 CONFIG_SPI_DAVINCI=y
 CONFIG_GPIO_DAVINCI=y
 CONFIG_GPIO_SYSCON=y
 CONFIG_POWER_RESET_KEYSTONE=y
 CONFIG_DAVINCI_WATCHDOG
 CONFIG_USB_DWC3=y
 CONFIG_KEYSTONE_USB_PHY=y
 CONFIG_TI_AEMIF=y
 CONFIG_KEYSTONE_IRQ=y

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Olof Johansson <olof@lixom.net>