common: Convert *.c/h from UTF-8 to ASCII enconfing

Convert UTF-8 chars to ASCII in cases where make sense. No Copyright or
names are converted.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Marek BehĂșn <kabel@kernel.org>
diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index dba0099..c8735d8 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -313,9 +313,9 @@
 
 	/*
 	 * As per the HW manual, we should not directly switch from 533 MHz to
-	 * 400 MHz and vice versa. To change the setting from 2’b01 (533 MHz)
-	 * to 2’b10 (400 MHz) or vice versa, Switch to 2’b11 (266 MHz) first,
-	 * and then switch to the target setting (2’b01 (533 MHz) or 2’b10
+	 * 400 MHz and vice versa. To change the setting from 2'b01 (533 MHz)
+	 * to 2'b10 (400 MHz) or vice versa, Switch to 2'b11 (266 MHz) first,
+	 * and then switch to the target setting (2'b01 (533 MHz) or 2'b10
 	 * (400 MHz)).
 	 */
 	if (new_sel != SEL_SDHI_266MHz && prev_sel != SEL_SDHI_266MHz) {