powerpc/44x: Remove STDBINUTILS kconfig option

STDBINUTILS is just a toggle to allow 256k page size to appear in the
possible page sizes list for the 44x.

Make 256k page size option appear all the time with an explicit
warning about binutils, and remove this unnecessary STDBINUTILS
config option.

Signed-off-by: Christophe Leroy <[e-mail]>
[mpe: Incorporate help text changes from David Laight]
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/f9981e81[e-mail]

arch/powerpc/Kconfig

···
 	def_bool y
 	depends on MEMORY_HOTPLUG
 
-config STDBINUTILS
-	bool "Using standard binutils settings"
-	depends on 44x
-	default y
-	help
-	  Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
-	  Note, that kernel will be able to run only those applications,
-	  which had been compiled using binutils later than 2.17.50.0.3 with
-	  '-zmax-page-size' set to 256K (the default is 64K). Or, if using
-	  the older binutils, you can patch them with a trivial patch, which
-	  changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
-
 choice
 	prompt "Page size"
 	default PPC_4K_PAGES
···
 	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 
 config PPC_256K_PAGES
-	bool "256k page size"
-	depends on 44x && !STDBINUTILS && !PPC_47x
+	bool "256k page size (Requires non-standard binutils settings)"
+	depends on 44x && !PPC_47x
 	help
 	  Make the page size 256k.
 
-	  As the ELF standard only requires alignment to support page
-	  sizes up to 64k, you will need to compile all of your user
-	  space applications with a non-standard binutils settings
-	  (see the STDBINUTILS description for details).
-
-	  Say N unless you know what you are doing.
+	  The kernel will only be able to run applications that have been
+	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
+	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
+	  definition from 0x10000 to 0x40000 in older versions.
 
 endchoice