[STYLE] Fix issues from checkpatch.pl

[STYLE] Fix issues from checkpatch.pl

not fixed issues (191):
  LINUX_VERSION_CODE (56)
  do not add new typedefs
  Use #include <linux/...> instead of <asm/...>
  externs should be avoided in .c files
  EXPORT_SYMBOL(foo); should immediately follow its function/variable
  do not use assignment in if condition
  use of in_atomic() is incorrect outside core kernel code
  Macros with complex values should be enclosed in parenthesis
  sizeof(& should be avoided
  usage of NR_CPUS is often wron
  uprobe/arch/arm/swap-asm/swap_uprobes.c (over 80 chars)

Change-Id: I1efb075ff2b47b78c56818e921a358868ce19948
Signed-off-by: Dmitry Kovalenko <d.kovalenko@samsung.com>