arm64: defconfig: Enable CONFIG_CLK_IMX8MP by default

Select CONFIG_CLK_IMX8MP by default to support i.MX8MP clock driver.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/configs/defconfig

@@ -691,6 +691,7 @@ CONFIG_COMMON_CLK_PWM=y
 CONFIG_CLK_RASPBERRYPI=m
 CONFIG_CLK_IMX8MM=y
 CONFIG_CLK_IMX8MN=y
+CONFIG_CLK_IMX8MP=y
 CONFIG_CLK_IMX8MQ=y
 CONFIG_CLK_IMX8QXP=y
 CONFIG_TI_SCI_CLK=y