imx: mx7ulp: Implement the clock functions for i2c driver

Implement the i2c clock enable and get function for mx7ulp. These
functions are required by imx_lpi2c driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/include/asm/arch-mx7ulp/clock.h b/arch/arm/include/asm/arch-mx7ulp/clock.h
index f21052e..ebf32c6 100644
--- a/arch/arm/include/asm/arch-mx7ulp/clock.h
+++ b/arch/arm/include/asm/arch-mx7ulp/clock.h
@@ -27,6 +27,10 @@
 
 u32 mxc_get_clock(enum mxc_clock clk);
 u32 get_lpuart_clk(void);
+#ifdef CONFIG_SYS_LPI2C_IMX
+int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
+u32 imx_get_i2cclk(unsigned i2c_num);
+#endif
 #ifdef CONFIG_MXC_OCOTP
 void enable_ocotp_clk(unsigned char enable);
 #endif