treewide: Convert macro and uses of __section(foo) to __section("foo")

This commit does the same thing as Linux commit 33def8498fdd.

Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.

Remove the quote operator # from compiler_attributes.h __section macro.

Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/lib/spl.c b/arch/arm/lib/spl.c
index b2b54f2..8e2bdf3 100644
--- a/arch/arm/lib/spl.c
+++ b/arch/arm/lib/spl.c
@@ -26,7 +26,7 @@
  * WARNING: This is going away very soon. Don't use it and don't submit
  * pafches that rely on it. The global_data area is set up in crt0.S.
  */
-gd_t gdata __attribute__ ((section(".data")));
+gd_t gdata __section(".data");
 #endif
 
 /*