imx: imx_clock: mmc: Add USDHC clock API

This patch adds an API to configure up the base USDHC clocks, taking a
bit-mask of silicon specific bits as an input from a higher layer in order
to direct the necessary clock source.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
diff --git a/plat/imx/common/include/imx_clock.h b/plat/imx/common/include/imx_clock.h
index f1d1912..51717c4 100644
--- a/plat/imx/common/include/imx_clock.h
+++ b/plat/imx/common/include/imx_clock.h
@@ -991,5 +991,6 @@
 
 void imx_clock_enable_uart(unsigned int uart_id, uint32_t uart_clk_en_bits);
 void imx_clock_disable_uart(unsigned int uart_id);
+void imx_clock_enable_usdhc(unsigned int usdhc_id, uint32_t usdhc_clk_en_bits);
 
 #endif /* __IMX_CLOCK_H__ */