UPSTREAM: soc/*: Use __fallthrough statement

Clang needs an attribute not a comment.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63068
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Change-Id: I78f87d80bd4f366ed6cfa74619dd107ac61bc935
GitOrigin-RevId: 507b0746d62cff575ab438c4e82ac7cfb0e93f26
Change-Id: I8a0a9fd57b4cb90865e33c5d6311ced93712ea5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/3642066
Tested-by: CopyBot Service Account <copybot.service@gmail.com>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
Commit-Queue: Peter Marheine <pmarheine@chromium.org>
diff --git a/src/soc/nvidia/tegra210/bootblock.c b/src/soc/nvidia/tegra210/bootblock.c
index 1657d7c..e8c4324 100644
--- a/src/soc/nvidia/tegra210/bootblock.c
+++ b/src/soc/nvidia/tegra210/bootblock.c
@@ -137,7 +137,7 @@
 			break;
 		case OP_UDELAY:
 			udelay(wa_op->val);
-			/* fall thru */
+			__fallthrough;
 		default:
 			continue;
 		}
diff --git a/src/soc/rockchip/rk3288/display.c b/src/soc/rockchip/rk3288/display.c
index 19a75de..9d6cca1 100644
--- a/src/soc/rockchip/rk3288/display.c
+++ b/src/soc/rockchip/rk3288/display.c
@@ -63,7 +63,7 @@
 			if (conf->vop_mode == VOP_MODE_EDP)
 				return;
 		}
-		/* fall thru */
+		__fallthrough;
 	case VOP_MODE_HDMI:
 		printk(BIOS_DEBUG, "Attempting to setup HDMI display.\n");
 		rkclk_configure_hdmi();
@@ -78,7 +78,7 @@
 			if (conf->vop_mode == VOP_MODE_HDMI)
 				return;
 		}
-		/* fall thru */
+		__fallthrough;
 	default:
 		printk(BIOS_WARNING, "Cannot read any edid info, aborting.\n");
 		return;