nimble: Fix HCI LE Set Data Length parameters range
nimble: Fix HCI LE Set Data Length parameters range

In Core specification 5.0 upper limit for TxTime is 17040 (0x4290).

X-Original-Commit: 61df8cfc85ae6cf062fc3d44999daec4869eb0c8

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble