efi_loader: decision on EFI_RT_SUPPORTED_RESET_SYSTEM

Move the logic determining which board supports reset at runtime to Kconfig.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index cd5436c..a7f2c68 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -101,4 +101,10 @@
 	  RFC 4646 format, e.g. "en-US;de-DE". The first language code is used
 	  to initialize the PlatformLang variable.
 
+config EFI_HAVE_RUNTIME_RESET
+	# bool "Reset runtime service is available"
+	bool
+	default y
+	depends on ARCH_BCM283X || FSL_LAYERSCAPE || PSCI_RESET || SYSRESET_X86
+
 endif