UPSTREAM: crypto: lib - tidy up lib/crypto Kconfig and Makefile

In preparation of introducing a set of crypto library interfaces, tidy
up the Makefile and split off the Kconfig symbols into a separate file.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[Jason: fold in parts of dc51f257]
(cherry picked from commit 746b2e024c67aa605ac12d135cd7085a49cf9dc4)
Bug: 152722841
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6b877d863ba62199745d9d573dda35caee42cc79

MAINTAINERS

@@ -3901,6 +3901,7 @@ F:	crypto/
 F:	drivers/crypto/
 F:	include/crypto/
 F:	include/linux/crypto*
+F:	lib/crypto/
 
 CRYPTOGRAPHIC RANDOM NUMBER GENERATOR
 M:	Neil Horman <nhorman@tuxdriver.com>

crypto/Kconfig

@@ -1895,6 +1895,7 @@ config CRYPTO_USER_API_AEAD
 config CRYPTO_HASH_INFO
 	bool
 
+source "lib/crypto/Kconfig"
 source "drivers/crypto/Kconfig"
 source crypto/asymmetric_keys/Kconfig
 source certs/Kconfig

lib/Makefile

@@ -96,6 +96,8 @@ endif
 obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
 CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
 
+obj-y += crypto/
+
 obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
 obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o

lib/crypto/Kconfig

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+comment "Crypto library routines"

lib/crypto/Makefile

@@ -0,0 +1 @@
+# SPDX-License-Identifier: GPL-2.0