perf/x86/amd: fix potential integer overflow on shift of a int

In the Linux kernel, the following vulnerability has been resolved:

perf/x86/amd: fix potential integer overflow on shift of a int

The left shift of int 32 bit integer constant 1 is evaluated using 32 bit

arithmetic and then passed as a 64 bit function argument. In the case where

i is 32 or more this can lead to an overflow. Avoid this by shifting

using the BIT_ULL macro instead.