stm32mp1: make functions and macros more common

Mainly remove suffix 1 from prefix stm32mp1 in several macros and functions
that can be used in drivers shared by different platforms.

Change-Id: I2295c44f5b1edac7e80a93c0e8dfd671b36e88e7
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/drivers/st/ddr/stm32mp1_ddr.c b/drivers/st/ddr/stm32mp1_ddr.c
index 79aff6e..b934754 100644
--- a/drivers/st/ddr/stm32mp1_ddr.c
+++ b/drivers/st/ddr/stm32mp1_ddr.c
@@ -639,7 +639,7 @@
 	 */
 
 	/* Change Bypass Mode Frequency Range */
-	if (stm32mp1_clk_get_rate(DDRPHYC) < 100000000U) {
+	if (stm32mp_clk_get_rate(DDRPHYC) < 100000000U) {
 		mmio_clrbits_32((uintptr_t)&priv->phy->dllgcr,
 				DDRPHYC_DLLGCR_BPS200);
 	} else {