boot: get rid of toplevel submenus

Sub options are indented anyway, so no need for empty menus / force people
to enter sub menus to see configuration options.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

boot/at91bootstrap/Config.in

@@ -1,4 +1,4 @@
-menuconfig BR2_TARGET_AT91BOOTSTRAP
+config BR2_TARGET_AT91BOOTSTRAP
 	depends on BR2_arm
 	bool "AT91 Bootstrap"
 	help

boot/barebox/Config.in

@@ -1,4 +1,4 @@
-menuconfig BR2_TARGET_BAREBOX
+config BR2_TARGET_BAREBOX
 	bool "Barebox"
 	help
 	  The Barebox bootloader, formerly known as U-Boot v2.

boot/grub/Config.in

@@ -9,7 +9,7 @@ config BR2_TARGET_GRUB_SPLASH
 	depends on BR2_TARGET_GRUB
 	help
 	  Add support for splashimage.
-	
+
 	  A splashimage is a 14-color indexed .xpm picture which
 	  is displayed as background for the grub menu.
 

boot/uboot/Config.in

@@ -1,4 +1,4 @@
-menuconfig BR2_TARGET_UBOOT
+config BR2_TARGET_UBOOT
 	bool "U-Boot"
 	help
 	  Build "Das U-Boot" Boot Monitor

boot/xloader/Config.in

@@ -1,4 +1,4 @@
-menuconfig BR2_TARGET_XLOADER
+config BR2_TARGET_XLOADER
 	bool "X-loader"
 	depends on BR2_cortex_a8 || BR2_cortex_a9
 	help