misc: habanalabs: irq: Add missing struct identifier for 'struct hl_eqe_work'

In kerneldoc format, data structures have to start with 'struct'
else the kerneldoc tooling/parsers/validators get confused.

Squashes the following W=1 warning:

 drivers/misc/habanalabs/irq.c:19: warning: cannot understand function prototype: 'struct hl_eqe_work '

Cc: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200626130525.389469-10-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/irq.c

@@ -10,7 +10,8 @@
 #include <linux/slab.h>
 
 /**
- * This structure is used to schedule work of EQ entry and armcp_reset event
+ * struct hl_eqe_work - This structure is used to schedule work of EQ
+ *                      entry and armcp_reset event
  *
  * @eq_work          - workqueue object to run when EQ entry is received
  * @hdev             - pointer to device structure