leds: ss4200: Add depend on x86 arch

There is only one x86 hardware where the driver leds-ss4200 applies to.
Add kconfig dependency to x86 architecture, fix help text whitespace.
Signed-off-by: NMartin Dummer <martin.dummer@gmx.net>
Signed-off-by: NJacek Anaszewski <j.anaszewski@samsung.com>

drivers/leds/Kconfig

@@ -413,6 +413,7 @@ config LEDS_INTEL_SS4200
 	tristate "LED driver for Intel NAS SS4200 series"
 	depends on LEDS_CLASS
 	depends on PCI && DMI
+	depends on X86
 	help
 	  This option enables support for the Intel SS4200 series of
 	  Network Attached Storage servers. You may control the hard