MFC r345009:

MFC r345009:

Fix a scribbler in the PMS driver.

The ESGL bit was left uninitialized when executing the REPORT LUNS
ioctl. This could allow a zeroed data buffer to be treated as a
scatter/gather list. The firmware would eventually walk past the end
of the data buffer, potentially find what looked like a valid
address/length pair, and write the result to semi-random memory.

Obtained from:  Dell EMC Isilon
Sponsored by:   Dell EMC Isilon

git-svn-id: svn://svn.freebsd.org/base/stable/10@345508 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f