Platform: OLPC: Add a config menu category for XO 1.75

Randy Dunlap says:

  drivers/platform/olpc/Kconfig needs to use "menuconfig" like all of the
  other Kconfig files in drivers/platform/ so that its menu is listed in
  the correct place in *config interfaces.

Otherwise he's sad.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/olpc/Kconfig

@@ -2,9 +2,19 @@ config OLPC_EC
 	select REGULATOR
 	bool
 
+menuconfig OLPC_XO175
+	bool "Platform support for OLPC XO 1.75 hardware"
+	depends on ARCH_MMP || COMPILE_TEST
+	help
+	  Say Y here to get to see options for the ARM-based OLPC platform.
+	  This option alone does not add any kernel code.
+
+	  Unless you have an OLPC XO laptop, you will want to say N.
+
+if OLPC_XO175
+
 config OLPC_XO175_EC
 	tristate "OLPC XO 1.75 Embedded Controller"
-	depends on ARCH_MMP || COMPILE_TEST
 	depends on SPI_SLAVE
 	depends on INPUT
 	depends on POWER_SUPPLY
@@ -15,3 +25,5 @@ config OLPC_XO175_EC
 	  button, restart, shutdown and battery charging status.
 
 	  Unless you have an OLPC XO laptop, you will want to say N.
+
+endif # OLPC_XO175