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/include/arch/aarch32/arch.h b/include/arch/aarch32/arch.h
index 8678bf3..d3b5d3c 100644
--- a/include/arch/aarch32/arch.h
+++ b/include/arch/aarch32/arch.h
@@ -264,7 +264,7 @@
 #define TCP10_BIT		(U(1) << 10)
 #define HCPTR_RESET_VAL		HCPTR_RES1
 
-/* VTTBR defintions */
+/* VTTBR definitions */
 #define VTTBR_RESET_VAL		ULL(0x0)
 #define VTTBR_VMID_MASK		ULL(0xff)
 #define VTTBR_VMID_SHIFT	U(48)