generic: platform/mikrotik: reorder Kconfig

The depends and select should apply to the sysfs driver, not the meta
config.

Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Tested-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>

target/linux/generic/files/drivers/platform/mikrotik/Kconfig

 menuconfig MIKROTIK
 	bool "Platform support for MikroTik RouterBoard virtual devices"
 	default n
-	depends on MTD
-	select LZO_DECOMPRESS
 	help
 	  Say Y here to get to see options for the MikroTik RouterBoard platform.
 	  This option alone does not add any kernel code.
@@ -12,6 +10,8 @@ if MIKROTIK
 
 config MIKROTIK_RB_SYSFS
 	tristate "RouterBoot sysfs support"
+	depends on MTD
+	select LZO_DECOMPRESS
 	help
 	  This driver exposes RouterBoot configuration in sysfs.