bnxt_en: Improve comment wording and error return code

bnxt_en: Improve comment wording and error return code

Improved wording and grammar in several comments for clarity.
  "the must belongs" -> "it must belong"
  "mininum" -> "minimum"
  "fileds" -> "fields"

Replaced return -1 with -EINVAL in hwrm_ring_alloc_send_msg()
to return a proper error code.

These changes enhance code readability and consistent error handling.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250615154051.1365631-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>