Replace __bss_end__ with __bss_end

Note this is a tree-wide change affecting multiple architectures.

At present we use __bss_start, but mostly __bss_end__. This seems
inconsistent and in a number of places __bss_end is used instead.

Change to use __bss_end for the BSS end symbol throughout U-Boot. This
makes it possible to use the asm-generic/sections.h file on all
archs.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/arm926ejs/mxs/start.S b/arch/arm/cpu/arm926ejs/mxs/start.S
index 7ccd337..373e6d8 100644
--- a/arch/arm/cpu/arm926ejs/mxs/start.S
+++ b/arch/arm/cpu/arm926ejs/mxs/start.S
@@ -133,7 +133,7 @@
 
 .globl _bss_end_ofs
 _bss_end_ofs:
-	.word __bss_end__ - _start
+	.word __bss_end - _start
 
 .globl _end_ofs
 _end_ofs:
diff --git a/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds b/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
index 6dc681a..fc0418a 100644
--- a/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
+++ b/arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
@@ -73,7 +73,7 @@
 		__bss_start = .;
 		*(.bss*)
 		. = ALIGN(4);
-		__bss_end__ = .;
+		__bss_end = .;
 	}
 
 	_end = .;