tenders/hvt: Correct typo of L3 page size in Arm64 comment
tenders/hvt: Correct typo of L3 page size in Arm64 comment

We are using the 4KB page, not 64KB page. The description
is a mistake. Fix it now.

Signed-off-by: Wei Chen <1c911f531faf03744585a2b6fb619b334ef5d655@arm.com>

Solo5/solo5,mato/solo5,Solo5/solo5,mato/solo5,mato/solo5