drm/amd/pp: missing curly braces in smu7_enable_sclk_mclk_dpm()

We added some more lines of code to this if statement but forgot to add
curly braces.

Fixes: 0c24e7ef ("drm/amd/powerplay: add specific changes for VEGAM in smu7_hwmgr.c")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>