boot: android: free newbootargs when done

Free newbootargs when the concatenation is done and bootargs env
is set.

Fixes: 86f4695b ("image: Fix Android boot image support")
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Signed-off-by: Nicolas Belin <nbelin@baylibre.com>
Link: https://lore.kernel.org/r/20241217-fix-bootargs-concatenation-v2-2-b2fd7cf4e130@baylibre.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/boot/image-android.c b/boot/image-android.c
index 5715828..362a5c7 100644
--- a/boot/image-android.c
+++ b/boot/image-android.c
@@ -322,6 +322,7 @@
 	}
 
 	env_set("bootargs", newbootargs);
+	free(newbootargs);
 
 	if (os_data) {
 		if (image_get_magic(ihdr) == IH_MAGIC) {