arm64: pmap: Mask VA operand in TLBI instructions

arm64: pmap: Mask VA operand in TLBI instructions

Bits 43:0 of the TLBI operand are bits 55:12 of the VA.  Leaving
bits 63:55 of the VA in bits 51:44 of the operand might wind up
setting the TTL field (47:44) and accidentally restricting which
translation levels are flushed in the TLB.

Approved by:	re (gjb)
Reviewed By:	andrew
MFC after:	3 days
Sponsored by:	Ampere Computing
Differential Revision:	https://reviews.freebsd.org/D34664

(cherry picked from commit a693a30038278b1ccd3e67b98d76e259ca1b405d)
(cherry picked from commit 2c013d142b146ed42d0fe6458ee8a394161ad370)