[NVPTX][Fix] Update minimum CPU for NVPTX intrinsics test

Summary:
This test requires at least sm_30 to run, but that is still below the
minimum supported version of sm_52 currently. Just set this to sm_60 so
the tests pass in the future.

Author: jhuber6

llvm/test/CodeGen/NVPTX/intrinsics.ll

@@ -1,7 +1,7 @@
-; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
-; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
-; RUN: %if ptxas && !ptxas-12.0 %{ llc < %s -march=nvptx -mcpu=sm_20 | %ptxas-verify %}
-; RUN: %if ptxas %{ llc < %s -march=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
+; RUN: llc < %s -march=nvptx -mcpu=sm_60 | FileCheck %s
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_60 | FileCheck %s
+; RUN: %if ptxas && !ptxas-12.0 %{ llc < %s -march=nvptx -mcpu=sm_60 | %ptxas-verify %}
+; RUN: %if ptxas %{ llc < %s -march=nvptx64 -mcpu=sm_60 | %ptxas-verify %}
 
 ; CHECK-LABEL: test_fabsf(
 define float @test_fabsf(float %f) {