drm/ast: ast_2100: Remove unneeded semicolon

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250905073712.3791260-1-nichen@iscas.ac.cn

drivers/gpu/drm/ast/ast_2100.c

@@ -336,7 +336,7 @@ static void ast_post_chip_2100(struct ast_device *ast)
 				default:
 					data = dram_reg_info->data;
 					break;
-				};
+				}
 
 				temp = ast_read32(ast, 0x12070);
 				temp &= 0xc;