bnxt_en: silence clang build warning

Clang build brings a warning:

    ../drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:133:12: warning:
    comparison of distinct pointer types ('typeof (tmo_us) *' (aka 'unsigned
    int *') and 'typeof (65535) *' (aka 'int *'))
    [-Wcompare-distinct-pointer-types]
      133 |                 tmo_us = min(tmo_us, BNXT_PTP_QTS_MAX_TMO_US);
          |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fix it by specifying proper type for BNXT_PTP_QTS_MAX_TMO_US.

Fixes: 7de3c22 ("bnxt_en: Add a timeout parameter to bnxt_hwrm_port_ts_query()")
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240509151833.12579-1-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Vadim Fedorenko

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

@@ -24,7 +24,7 @@
 
 #define BNXT_PTP_DFLT_TX_TMO	1000 /* ms */
 #define BNXT_PTP_QTS_TIMEOUT	1000
-#define BNXT_PTP_QTS_MAX_TMO_US	65535
+#define BNXT_PTP_QTS_MAX_TMO_US	65535U
 #define BNXT_PTP_QTS_TX_ENABLES	(PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID |	\
 				 PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \
 				 PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET)