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 <[e-mail]>
Reviewed-by: Thomas Zimmermann <[e-mail]>
Signed-off-by: Thomas Zimmermann <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/ast/ast_2100.c

···
 				default:
 					data = dram_reg_info->data;
 					break;
-				};
+				}
 
 				temp = ast_read32(ast, 0x12070);
 				temp &= 0xc;