imx8ulp: clock: Support to enable/disable the ADC1 clock

This patch implements enable_adc1_clk() to enable or disable the ADC1
clock on i.MX8ULP.

Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/include/asm/arch-imx8ulp/clock.h b/arch/arm/include/asm/arch-imx8ulp/clock.h
index cc70284..c0f32cc 100644
--- a/arch/arm/include/asm/arch-imx8ulp/clock.h
+++ b/arch/arm/include/asm/arch-imx8ulp/clock.h
@@ -41,4 +41,5 @@
 void mxs_set_lcdclk(u32 base_addr, u32 freq_in_khz);
 void reset_lcdclk(void);
 void enable_mipi_dsi_clk(unsigned char enable);
+void enable_adc1_clk(bool enable);
 #endif