platform/x86: Add rfkill dependency to ACPI_TOSHIBA entry

Commit 2fdde834 ("toshiba_acpi: Add WWAN RFKill support") added
WWAN rfkill support to the driver, but the KConfig entry was not
updated to add the RFKill dependency, causing a broken build if
RFKill is not selected.

This patch adds the RFKILL dependency to the KConfig entry, fixing
the build issue.
Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/Kconfig

@@ -641,6 +641,7 @@ config ACPI_TOSHIBA
 	depends on INPUT
 	depends on SERIO_I8042 || SERIO_I8042 = n
 	depends on ACPI_VIDEO || ACPI_VIDEO = n
+	depends on RFKILL || RFKILL = n
 	select INPUT_POLLDEV
 	select INPUT_SPARSEKMAP
 	---help---