fix(stm32mp1_clk): set other clocks as always on

AXI, MPU and MCU clocks are always on, put them in the list
in the function clock_is_always_on().

Change-Id: I969a442274d2da6c59636f3293de1c31b4c8e3b1
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index 9764a9f..a341cdb 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -1091,6 +1091,9 @@
 	case PLL3_P:
 	case PLL3_Q:
 	case PLL3_R:
+	case CK_AXI:
+	case CK_MPU:
+	case CK_MCU:
 		return true;
 	default:
 		return false;