IB/hf1: Use string_upper() instead of an open coded variant

Use string_upper() from the string helper module instead of an	open coded
variant.

Link: https://lore.kernel.org/r/20211001123153.67379-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
1 file changed