ASoC: atmel: mchp-spdifrx needs COMMON_CLK

Compile-testing this driver on an older platform without CONFIG_COMMON_CLK fails with

ERROR: modpost: "clk_set_min_rate" [sound/soc/atmel/snd-soc-mchp-spdifrx.ko] undefined!

Make this is a strict dependency.

Fixes: ef265c55 ("ASoC: mchp-spdifrx: add driver for SPDIF RX")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20201203223815.1353451-1-arnd@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/atmel/Kconfig

@@ -148,6 +148,7 @@ config SND_MCHP_SOC_SPDIFTX
 config SND_MCHP_SOC_SPDIFRX
 	tristate "Microchip ASoC driver for boards using S/PDIF RX"
 	depends on OF && (ARCH_AT91 || COMPILE_TEST)
+	depends on COMMON_CLK
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 	select REGMAP_MMIO
 	help