ARM: defconfig: drop CONFIG_SERIAL_OMAP references

This driver is mutually exclusive with the new 8250_OMAP
driver, so 'make defconfig' turns it off already. Drop
the reference now.

Fixes: 077e1cde ("ARM: omap2plus_defconfig: Enable 8250_OMAP")
Fixes: f98d4514 ("ARM: multi_v7_defconfig: Enable 8250-omap serial driver and use it by default")
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -377,8 +377,6 @@ CONFIG_SERIAL_MSM=y
 CONFIG_SERIAL_MSM_CONSOLE=y
 CONFIG_SERIAL_VT8500=y
 CONFIG_SERIAL_VT8500_CONSOLE=y
-CONFIG_SERIAL_OMAP=y
-CONFIG_SERIAL_OMAP_CONSOLE=y
 CONFIG_SERIAL_BCM63XX=y
 CONFIG_SERIAL_BCM63XX_CONSOLE=y
 CONFIG_SERIAL_XILINX_PS_UART=y

arch/arm/configs/omap2plus_defconfig

@@ -419,8 +419,6 @@ CONFIG_SERIAL_8250_DETECT_IRQ=y
 CONFIG_SERIAL_8250_RSA=y
 CONFIG_SERIAL_8250_OMAP=y
 CONFIG_SERIAL_OF_PLATFORM=y
-CONFIG_SERIAL_OMAP=y
-CONFIG_SERIAL_OMAP_CONSOLE=y
 CONFIG_SERIAL_DEV_BUS=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_SPI=y