efi_loader: Uart device path missing break

In the devicepath node to text conversion for Uart nodes a break statement
is missing.

Indicated by Coverity Scan CID 330038
Fixes: 62df6e9c ("efi_loader: Uart device path")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

lib/efi_loader/efi_device_path_to_text.c

@@ -126,8 +126,10 @@ static char *dp_msging(char *s, struct efi_device_path *dp)
 		switch (uart->stop_bits) {
 		case 2:
 			s += sprintf(s, "1.5)");
+			break;
 		default:
 			s += sprintf(s, "%d)", uart->stop_bits);
+			break;
 		}
 		break;
 	}