UPSTREAM: timekeeping: Boot should be boottime for coarse ns accessor

Somewhere in all the patchsets before, this cleanup got lost.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/20190624091539.13512-1-Jason@zx2c4.com


(cherry picked from commit d48e0cd8fcaf314175a15d3076d7a1e71bd4e628)
Bug: 152722841
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4986ad53fbb6b2ddc99627c2ded37327c6f66af6