arm64: mm: Remove PTE_BIT_FUNC macro

Expand out the pte manipulation functions. This makes our life easier
when using things like tags and cscope.

Signed-off-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-commit: 44b6dfc556811c0e6981329e29e1865fc7a8847d
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


[imaund@codeaurora.org: reworked Laura's calls of the PTE_BIT_FUNC macro, as
  it has been removed. Instead, implement them as static inline functions.]
Signed-off-by: Ian Maund <imaund@codeaurora.org>