x86: Fix non-static inlines

Four instances of incorrect usage of non-static "inline" crept up
in arch/x86, all trivial; cleaning them up:

EVT_TO_HPET_DEV() - made static, it is only used in kernel/hpet.c

Debug version of check_iommu_entries() is an __init function.
Non-debug dummy empty version of it is declared "inline" instead -
which doesn't help to eliminate it (the caller is in a different unit,
inlining doesn't happen).
Switch to non-inlined __init function, which does eliminate it
(by discarding it as part of __init section).

crypto/sha-mb/sha1_mb.c: looks like they just forgot to add "static"
to their two internal inlines, which emitted two unused functions into
vmlinux.

      text     data      bss       dec     hex filename
  95903394 20860288 35991552 152755234 91adc22 vmlinux_before
  95903266 20860288 35991552 152755106 91adba2 vmlinux

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1460739626-12179-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>