When our linker merges .SUNW_dof sections from multiple files, it simply
concatenates the DOF tables into one section. Previously, the USDT init
code in drti.o would only look at the first table in the DOF section; with
this change, it iterates over all the tables, passing each DOF table to
the kernel.

PR:		186821
Submitted by:	Fedor Indutny <fedor@indutny.com>
MFC after:	1 month