event/cnxk: fix sub-event clearing mask length

[ upstream commit b476620 ]

Fix incorrect mask used when clearing subevent type masking out
useful data.

Fixes: e239e0d ("event/cnxk: add SSO HW device operations")

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>

drivers/event/cnxk/cnxk_eventdev.h

@@ -44,7 +44,7 @@
 #define CNXK_TT_FROM_EVENT(x)	    (((x) >> 38) & SSO_TT_EMPTY)
 #define CNXK_EVENT_TYPE_FROM_TAG(x) (((x) >> 28) & 0xf)
 #define CNXK_SUB_EVENT_FROM_TAG(x)  (((x) >> 20) & 0xff)
-#define CNXK_CLR_SUB_EVENT(x)	    (~(0xffu << 20) & x)
+#define CNXK_CLR_SUB_EVENT(x)	    (~(0xffull << 20) & x)
 #define CNXK_GRP_FROM_TAG(x)	    (((x) >> 36) & 0x3ff)
 #define CNXK_SWTAG_PEND(x)	    (BIT_ULL(62) & x)