bzip2/lzma: quiet Kconfig warning for INITRAMFS_COMPRESSION_NONE

Impact: quiet Kconfig warning

It appears that Kconfig simply has no way to provide defaults for
entries that exist inside a conditionalized choice block.
Fortunately, it turns out we don't actually ever use
CONFIG_INITRAMFS_COMPRESSION_NONE, so we can just drop it for
everything outside the choice block.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

usr/Kconfig

@@ -72,10 +72,8 @@ config RD_LZMA
 	  Support loading of a LZMA encoded initial ramdisk or cpio buffer
 	  If unsure, say N.
 
-if INITRAMFS_SOURCE!=""
-
 choice
-	prompt "Built-in initramfs compression mode"
+	prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!=""
 	help
 	  This option decides by which algorithm the builtin initramfs
 	  will be compressed.  Several compression algorithms are
@@ -134,14 +132,3 @@ config INITRAMFS_COMPRESSION_LZMA
 	  smaller with LZMA in comparison to gzip.
 
 endchoice
-
-endif
-
-if INITRAMFS_SOURCE=""
-# The builtin initramfs is so small so we don't want to bug the user...
-
-config INITRAMFS_COMPRESSION_NONE
-	bool
-	default y
-
-endif

usr/Makefile

@@ -6,9 +6,6 @@ klibcdirs:;
 PHONY += klibcdirs
 
 
-# No compression
-suffix_$(CONFIG_INITRAMFS_COMPRESSION_NONE)   =
-
 # Gzip, but no bzip2
 suffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP)   = .gz