Kbuild: Always use $(PHASE_)

It is confusing to have both "$(PHASE_)" and "$(XPL_)" be used in our
Makefiles as part of the macros to determine when to do something in our
Makefiles based on what phase of the build we are in. For consistency,
bring this down to a single macro and use "$(PHASE_)" only.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index b729824..ac2b9a7 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -3,17 +3,17 @@
 # Makefile for asymmetric cryptographic keys
 #
 
-obj-$(CONFIG_$(XPL_)ASYMMETRIC_KEY_TYPE) += asymmetric_keys.o
+obj-$(CONFIG_$(PHASE_)ASYMMETRIC_KEY_TYPE) += asymmetric_keys.o
 
 asymmetric_keys-y := asymmetric_type.o
 
-obj-$(CONFIG_$(XPL_)ASYMMETRIC_PUBLIC_KEY_SUBTYPE) += public_key_helper.o
-obj-$(CONFIG_$(XPL_)ASYMMETRIC_PUBLIC_KEY_LEGACY) += public_key.o
+obj-$(CONFIG_$(PHASE_)ASYMMETRIC_PUBLIC_KEY_SUBTYPE) += public_key_helper.o
+obj-$(CONFIG_$(PHASE_)ASYMMETRIC_PUBLIC_KEY_LEGACY) += public_key.o
 
 #
 # RSA public key parser
 #
-obj-$(CONFIG_$(XPL_)RSA_PUBLIC_KEY_PARSER_LEGACY) += rsa_public_key.o
+obj-$(CONFIG_$(PHASE_)RSA_PUBLIC_KEY_PARSER_LEGACY) += rsa_public_key.o
 rsa_public_key-y := \
 	rsapubkey.asn1.o \
 	rsa_helper.o
@@ -31,9 +31,9 @@
 #
 # X.509 Certificate handling
 #
-obj-$(CONFIG_$(XPL_)X509_CERTIFICATE_PARSER) += x509_key_parser.o
+obj-$(CONFIG_$(PHASE_)X509_CERTIFICATE_PARSER) += x509_key_parser.o
 x509_key_parser-y := x509_helper.o
-x509_key_parser-$(CONFIG_$(XPL_)X509_CERTIFICATE_PARSER_LEGACY) += \
+x509_key_parser-$(CONFIG_$(PHASE_)X509_CERTIFICATE_PARSER_LEGACY) += \
 	x509.asn1.o \
 	x509_akid.asn1.o \
 	x509_cert_parser.o \
@@ -49,21 +49,21 @@
 #
 # PKCS#7 message handling
 #
-obj-$(CONFIG_$(XPL_)PKCS7_MESSAGE_PARSER) += pkcs7_message.o
+obj-$(CONFIG_$(PHASE_)PKCS7_MESSAGE_PARSER) += pkcs7_message.o
 pkcs7_message-y := pkcs7_helper.o
-pkcs7_message-$(CONFIG_$(SPL_)PKCS7_MESSAGE_PARSER_LEGACY) += \
+pkcs7_message-$(CONFIG_$(PHASE_)PKCS7_MESSAGE_PARSER_LEGACY) += \
 	pkcs7.asn1.o \
 	pkcs7_parser.o
 
 $(obj)/pkcs7_parser.o: $(obj)/pkcs7.asn1.h
 $(obj)/pkcs7.asn1.o: $(obj)/pkcs7.asn1.c $(obj)/pkcs7.asn1.h
 
-obj-$(CONFIG_$(XPL_)PKCS7_VERIFY) += pkcs7_verify.o
+obj-$(CONFIG_$(PHASE_)PKCS7_VERIFY) += pkcs7_verify.o
 
 #
 # Signed PE binary-wrapped key handling
 #
-obj-$(CONFIG_$(XPL_)MSCODE_PARSER_LEGACY) += mscode.o
+obj-$(CONFIG_$(PHASE_)MSCODE_PARSER_LEGACY) += mscode.o
 
 mscode-y := \
 	mscode_parser.o \