libpayload: Remove unnecessary brackets

This fixes compilation with clang.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I675056c8a15fe446bba81a144bfea64d106df293
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77435
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/payloads/libpayload/curses/form/frm_driver.c b/payloads/libpayload/curses/form/frm_driver.c
index e058d19..2759148 100644
--- a/payloads/libpayload/curses/form/frm_driver.c
+++ b/payloads/libpayload/curses/form/frm_driver.c
@@ -1326,7 +1326,7 @@
 	      field->opts = oldopts;
 	      returnCode(E_CURRENT);
 	    }
-	  if ((form->curpage == field->page))
+	  if (form->curpage == field->page)
 	    {
 	      if (changed_opts & O_VISIBLE)
 		{