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/plat/imx/imx8m/imx8mm/gpc.c b/plat/imx/imx8m/imx8mm/gpc.c
index cc1cb10..e0e38a9 100644
--- a/plat/imx/imx8m/imx8mm/gpc.c
+++ b/plat/imx/imx8m/imx8mm/gpc.c
@@ -376,7 +376,7 @@
 	/*
 	 * Set the CORE & SCU power up timing:
 	 * SW = 0x1, SW2ISO = 0x1;
-	 * the CPU CORE and SCU power up timming counter
+	 * the CPU CORE and SCU power up timing counter
 	 * is drived  by 32K OSC, each domain's power up
 	 * latency is (SW + SW2ISO) / 32768
 	 */