Description: IB/hfi1: Fix sdma.h tx->num_descs off-by-one error
References:
Notes:
 carnil> Introduced in fd8958efe877 ("IB/hfi1: Fix sdma.h tx->num_descs off-by-one
 carnil> errors"). Vulnerable versions: 4.19.291 5.4.251 5.10.188 5.15.99 6.1.16 6.2.3
 carnil> 6.3-rc1.
Bugs:
upstream: released (6.8-rc6) [e6f57c6881916df39db7d95981a8ad2b9c3458d6]
6.7-upstream-stable: released (6.7.7) [9034a1bec35e9f725315a3bb6002ef39666114d9]
6.6-upstream-stable: released (6.6.19) [a2fef1d81becf4ff60e1a249477464eae3c3bc2a]
6.1-upstream-stable: released (6.1.80) [52dc9a7a573dbf778625a0efca0fca55489f084b]
5.10-upstream-stable: released (5.10.211) [3f38d22e645e2e994979426ea5a35186102ff3c2]
4.19-upstream-stable: released (4.19.308) [115b7f3bc1dce590a6851a2dcf23dc1100c49790]
sid: released (6.7.7-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: needed
4.19-buster-security: needed