perf vendor events amd: Add ITLB Instruction Fetch Hits event for zen1

The ITLB Instruction Fetch Hits event isn't documented even in later
zen1 PPRs, but it seems to count correctly on zen1 hardware.

Add it to zen1 group so zen1 users can use the upcoming IC Fetch Miss
Ratio Metric.

The IF1G, 1IF2M, IF4K (Instruction fetches to a 1 GB, 2 MB, and 4K page)
unit masks are not added because unlike zen2 hardware, zen1 hardware
counts all its unit masks with a 0 unit mask according to the old
convention:

  zen1$ perf stat -e cpu/event=0x94/,cpu/event=0x94,umask=0xff/ sleep 1

   Performance counter stats for 'sleep 1':

             211,318      cpu/event=0x94/u
             211,318      cpu/event=0x94,umask=0xff/u

Rome/zen2:

  zen2$ perf stat -e cpu/event=0x94/,cpu/event=0x94,umask=0xff/ sleep 1

   Performance counter stats for 'sleep 1':

                   0      cpu/event=0x94/u
             190,744      cpu/event=0x94,umask=0xff/u

Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Acked-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> # on Zen2 only (3900x)
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Jon Grimm <jon.grimm@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Jambor <mjambor@suse.cz>
Cc: Martin Liška <mliska@suse.cz>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vijay Thakkar <vijaythakkar@me.com>
Cc: William Cohen <wcohen@redhat.com>
Cc: Yunfeng Ye <yeyunfeng@huawei.com>
Link: http://lore.kernel.org/lkml/20200901220944.277505-2-kim.phillips@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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