RDMA/hfi1: Workaround truncation compilation error

RDMA/hfi1: Workaround truncation compilation error

Increase name array to be large enough to overcome the following
compilation error.

drivers/infiniband/hw/hfi1/efivar.c: In function ‘read_hfi1_efi_var’:
drivers/infiniband/hw/hfi1/efivar.c:124:44: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
  124 |         snprintf(name, sizeof(name), "%s-%s", prefix_name, kind);
      |                                            ^
drivers/infiniband/hw/hfi1/efivar.c:124:9: note: ‘snprintf’ output 2 or more bytes (assuming 65) into a destination of size 64
  124 |         snprintf(name, sizeof(name), "%s-%s", prefix_name, kind);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/hfi1/efivar.c:133:52: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
  133 |                 snprintf(name, sizeof(name), "%s-%s", prefix_name, kind);
      |                                                    ^
drivers/infiniband/hw/hfi1/efivar.c:133:17: note: ‘snprintf’ output 2 or more bytes (assuming 65) into a destination of size 64
  133 |                 snprintf(name, sizeof(name), "%s-%s", prefix_name, kind);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[6]: *** [scripts/Makefile.build:243: drivers/infiniband/hw/hfi1/efivar.o] Error 1

Fixes: c03c08d50b3d ("IB/hfi1: Check upper-case EFI variables")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/238fa39a8fd60e87a5ad7e1ca6584fcdf32e9519.1698159993.git.leonro@nvidia.com
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>