gve: Fix various typos and improve code comments

gve: Fix various typos and improve code comments

- Correct spelling and improves the clarity of comments
   "confiugration" -> "configuration"
   "spilt" -> "split"
   "It if is 0" -> "If it is 0"
   "DQ" -> "DQO" (correct abbreviation)
- Clarify BIT(0) flag usage in gve_get_priv_flags()
- Replaced hardcoded array size with GVE_NUM_PTYPES
  for clarity and maintainability.

These changes are purely cosmetic and do not affect functionality.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Joe Damato <joe@dama.to>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/20250616054504.1644770-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>