fix(security): add CVE-2024-7881 mitigation to C1-Premium CPU

This patch mitigates Cat B erratum 3651221 [2] / CVE-2024-7881 [1]
for C1-Premium CPU. This CVE applies to r0p0 and
is fixed in r1p0 [2].

This CVE can be mitigated by disabling the affected prefetcher
setting CPUACTLR6_EL1[41].

[1] https://developer.arm.com/documentation/110326/latest/
[2] https://developer.arm.com/documentation/111078/latest/

Signed-off-by: Arvind Ram Prakash <[email protected]>
Change-Id: I70b50700bc1618e0f8f4121efc9fe89e2742ed74
2 files changed