reset: fix Kconfig menu to include reset drivers in sub-menu

In "make menuconfig", reset drivers are currently lined up together
with the reset sub-system menu, like this:

-*- Reset Controller Support ----
< > Hi6220 Reset Driver

(It also means, the menu "Reset Controller Support" is always empty.)

"Hi6220 Reset Driver" should go into the sub-menu of the
"Reset Controller Support".

Signed-off-by: Masahiro Yamada <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

drivers/reset/Kconfig

···
 
 	  If unsure, say no.
 
+if RESET_CONTROLLER
+
 config RESET_OXNAS
 	bool
 
 source "drivers/reset/sti/Kconfig"
 source "drivers/reset/hisilicon/Kconfig"
+
+endif

drivers/reset/sti/Kconfig

···
 
 config STI_RESET_SYSCFG
 	bool
-	select RESET_CONTROLLER
 
 config STIH415_RESET
 	bool