x86/msr-index: Cleanup bit defines

x86/msr-index: Cleanup bit defines

Greg pointed out that speculation related bit defines are using (1 << N)
format instead of BIT(N). Aside of that (1 << N) is wrong as it should use
1UL at least.

Clean it up.

[ Josh Poimboeuf: Fix tools build ]

Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
CVE-2018-12126
CVE-2018-12127
CVE-2018-12130

(backported from commit a4a931802e51223b3e0548fc31fb3f7dc8f6d032)
[tyhicks: Backport to 4.15:
 - The Makefiles do not contain override directives on the modified
   lines]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>