Rename RH_DISABLE_DEPRECATED to RHEL_DIFFERENCES

The intent of RH_DISABLE_DEPRECATED was to provide Red Hat a
simple way to disable drivers it did not want to support in RHEL.

As the config option was applied to more drivers and infra, it became
clear the option was being used for not only deprecating drivers (which
implied limited support) to disabling drivers (implying no support).

Using the word 'deprecated' seemed confusing in the second scenario.
Rename the option to be more generic and useable across more parts
of the kernel tree.

The new wording is RHEL_DIFFERENCES.

Upstream Status: RHEL only

Kconfig.redhat

@@ -5,7 +5,7 @@
 
 menu "Red Hat options"
 
-config RH_DISABLE_DEPRECATED
+config RHEL_DIFFERENCES
 	bool "Remove support for deprecated features"
 	help
 	  Red Hat may choose to deprecate certain features in its kernels.

arch/x86/kernel/setup.c

@@ -1341,7 +1341,7 @@ void __init setup_arch(char **cmdline_p)
 		efi_apply_memmap_quirks();
 #endif
 
-#ifdef CONFIG_RH_DISABLE_DEPRECATED
+#ifdef CONFIG_RHEL_DIFFERENCES
 	rh_check_supported();
 #endif
 

include/linux/kernel.h

@@ -533,7 +533,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 
 struct module;
 
-#ifdef CONFIG_RH_DISABLE_DEPRECATED
+#ifdef CONFIG_RHEL_DIFFERENCES
 void mark_hardware_unsupported(const char *msg);
 void mark_hardware_deprecated(const char *msg);
 void mark_tech_preview(const char *msg, struct module *mod);

kernel/Makefile

@@ -13,6 +13,7 @@ obj-y     = fork.o exec_domain.o panic.o \
 	    async.o range.o smpboot.o ucount.o regset.o
 
 obj-$(CONFIG_RH_DISABLE_DEPRECATED) += rh_taint.o
+obj-$(CONFIG_RHEL_DIFFERENCES) += rh_taint.o
 obj-$(CONFIG_USERMODE_DRIVER) += usermode_driver.o
 obj-$(CONFIG_MODULES) += kmod.o
 obj-$(CONFIG_MULTIUSER) += groups.o