hv:fix MISRA-C return value violation

1) Change these 5 APIs to void type:
   vcpu_inject_pf
   uart16550_calc_baud_div
   uart16550_set_baud_rate
   console_init
   ptdev_activate_entry
No need to return 'entry' for ptdev_activate_entry
since the input parameter is 'entry'.
2) no need to check return value for the caller
   such as sbuf_put/console_putc/serial_puts/serial_get_rx_data

Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>

hypervisor/debug/logmsg.c

@@ -159,7 +159,7 @@ void do_logmsg(uint32_t severity, const char *fmt, ...)
 
 			for (i = 0; i < (msg_len - 1) / LOG_ENTRY_SIZE + 1;
 					i++) {
-				sbuf_put(sbuf, (uint8_t *)buffer +
+				(void)sbuf_put(sbuf, (uint8_t *)buffer +
 							i * LOG_ENTRY_SIZE);
 			}
 		}