arm: fix __efi_runtime_start/end definitions

__efi_runtime_start/end are defined as c variables for arm7 only in
order to force the compiler emit relative references. However, defining
those within a section definition will do the same thing since [0].
On top of that the v8 linker scripts define it as a symbol.

So let's remove the special sections from the linker scripts, the
variable definitions from sections.c and define them as a symbols within
the correct section.

[0] binutils commit 6b3b0ab89663 ("Make linker assigned symbol dynamic only for shared object")

Suggested-by: Sam Edwards <CFSworks@gmail.com>
Reviewed-by: Sam Edwards <CFSworks@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Sam Edwards <CFSworks@gmail.com> # Binary output identical
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 6094920..b6bca53 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -35,6 +35,7 @@
 extern char __ctors_start[], __ctors_end[];
 
 extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
+extern char __efi_runtime_start[], __efi_runtime_stop[];
 
 /* function descriptor handling (if any).  Override
  * in asm/sections.h */