fix(tree): correct some typos

found using codespell (https://github.com/codespell-project/codespell).

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I1bfa797e3460adddeefa916bb68e22beddaf6373
diff --git a/drivers/renesas/common/pfc_regs.h b/drivers/renesas/common/pfc_regs.h
index 4187733..36084f5 100644
--- a/drivers/renesas/common/pfc_regs.h
+++ b/drivers/renesas/common/pfc_regs.h
@@ -146,10 +146,10 @@
 #define GPIO_OUTDTL7		(GPIO_BASE + 0x5848U)
 #define GPIO_BOTHEDGE7		(GPIO_BASE + 0x584CU)
 
-/* Pin functon base address */
+/* Pin function base address */
 #define PFC_BASE		(0xE6060000U)
 
-/* Pin functon registers */
+/* Pin function registers */
 #define PFC_PMMR		(PFC_BASE + 0x0000U)
 #define PFC_GPSR0		(PFC_BASE + 0x0100U)
 #define PFC_GPSR1		(PFC_BASE + 0x0104U)