imx8m: clock: add type of set_clk_eqos

Add type of set_clk_eqos to make it could be used by other files.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/include/asm/arch-imx8m/clock.h b/arch/arm/include/asm/arch-imx8m/clock.h
index 87cc4d3..c545eb8 100644
--- a/arch/arm/include/asm/arch-imx8m/clock.h
+++ b/arch/arm/include/asm/arch-imx8m/clock.h
@@ -274,3 +274,4 @@
 void enable_ocotp_clk(unsigned char enable);
 int enable_i2c_clk(unsigned char enable, unsigned int i2c_num);
 int set_clk_enet(enum enet_freq type);
+int set_clk_eqos(enum enet_freq type);