hv: remove CONFIG_LOG_DESTINATION

The CONFIG_LOG_DESTINATION parameter selects where the logging messages
send to，serial console or memory or npk device MMIO region.

Now we want to remove it and check the loglevel of each channel,close the
output when the loglevel is ZERO.

Tracked-On: #6934
Signed-off-by: Chenli Wei <chenli.wei@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>

hypervisor/release/logmsg.c

@@ -6,7 +6,7 @@
 
 #include <types.h>
 
-void init_logmsg(__unused uint32_t flags) {}
+void init_logmsg() {}
 void do_logmsg(__unused uint32_t severity, __unused const char *fmt, ...) {}
 void printf(__unused const char *fmt, ...) {}
 void vprintf(__unused const char *fmt, __unused va_list args) {}