plugins/zns: Fix zns.c linux kernel check patch errors and warnings

plugins/zns: Fix zns.c linux kernel check patch errors and warnings

Note: Still the remaining warning messages are not fixed as same with nvme.c.

WARNING: quoted string split across lines
+       const char *desc = "Send a ZNS specific Identify Controller command to "
+                          "the given device and report information about the specified "

WARNING: quoted string split across lines
+                          "the given device and report information about the specified "
+                          "controller in various formats.";

WARNING: quoted string split across lines
+       const char *desc = "Send a ZNS specific Identify Namespace command to "
+                          "the given device and report information about the specified "

WARNING: quoted string split across lines
+                          "the given device and report information about the specified "
+                          "namespace in varios formats.";

WARNING: quoted string split across lines
+       const char *desc = "The zone append command is used to write to a zone "
+                          "using the slba of the zone, and the write will be appended from the "

WARNING: quoted string split across lines
+                          "using the slba of the zone, and the write will be appended from the "
+                          "write pointer of the zone";

total: 0 errors, 6 warnings, 1278 lines checked

Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>