clk: stm32mp1: solve type issue in stm32mp1_lse_enable and stm32mp1_clktree

Solve type issue in stm32mp1_lse_enable and stm32mp1_clktree.

This patch solves the warnings when compiling with W=1
on stm32mp1 board:

clk_stm32mp1.c: In function ‘stm32mp1_lse_enable’:
clk_stm32mp1.c:1238:15: warning: comparison of integer expressions
  of different signedness: ‘u32’ {aka ‘unsigned int’} and ‘int’
  [-Wsign-compare]
clk_stm32mp1.c:1239:13: warning: comparison of integer expressions
  of different signedness: ‘u32’ {aka ‘unsigned int’} and ‘int’
  [-Wsign-compare]

clk_stm32mp1.c: In function ‘stm32mp1_clktree’:
clk_stm32mp1.c:1814:17: warning: comparison of integer expressions
  of different signedness: ‘int’ and ‘unsigned int’
  [-Wsign-compare]

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c
index da66bde..fd8c821 100644
--- a/drivers/clk/clk_stm32mp1.c
+++ b/drivers/clk/clk_stm32mp1.c
@@ -1218,7 +1218,7 @@
 }
 
 static void stm32mp1_lse_enable(fdt_addr_t rcc, int bypass, int digbyp,
-				int lsedrv)
+				u32 lsedrv)
 {
 	u32 value;
 
@@ -1651,8 +1651,8 @@
 	unsigned int clkdiv[CLKDIV_NB];
 	unsigned int pllcfg[_PLL_NB][PLLCFG_NB];
 	ofnode plloff[_PLL_NB];
-	int ret;
-	int i, len;
+	int ret, len;
+	uint i;
 	int lse_css = 0;
 	const u32 *pkcs_cell;
 
@@ -1698,7 +1698,8 @@
 		stm32mp1_lsi_set(rcc, 1);
 
 	if (priv->osc[_LSE]) {
-		int bypass, digbyp, lsedrv;
+		int bypass, digbyp;
+		u32 lsedrv;
 		struct udevice *dev = priv->osc_dev[_LSE];
 
 		bypass = dev_read_bool(dev, "st,bypass");