clk: zynqmp: Enable the driver if ZYNQMP_FIRMWARE is selected

When booting the kernel on zynqmp based platforms such as Ultra96v2,
peripheral drivers such as that for the sdcard depend on the presence
of clocks.

Enable the clock driver if it's dependencies are compiled to avoid
building an unbootable kernel.
Signed-off-by: Punit Agrawal <punit1.agrawal@toshiba.co.jp>
Link: https://lore.kernel.org/r/20210322061754.1065367-2-punit1.agrawal@toshiba.co.jpAcked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/zynqmp/Kconfig

@@ -4,6 +4,7 @@ config COMMON_CLK_ZYNQMP
 	bool "Support for Xilinx ZynqMP Ultrascale+ clock controllers"
 	depends on ARCH_ZYNQMP || COMPILE_TEST
 	depends on ZYNQMP_FIRMWARE
+	default ZYNQMP_FIRMWARE
 	help
 	  Support for the Zynqmp Ultrascale clock controller.
 	  It has a dependency on the PMU firmware.