meson, configure: move --tls-priority to meson

Use the new support for string option parsing.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -311,7 +311,6 @@ bsd_user=""
 pkgversion=""
 pie=""
 coroutine=""
-tls_priority="NORMAL"
 plugins="$default_feature"
 meson=""
 meson_args=""
@@ -939,8 +938,6 @@ for opt do
   --enable-uuid|--disable-uuid)
       echo "$0: $opt is obsolete, UUID support is always built" >&2
   ;;
-  --tls-priority=*) tls_priority="$optarg"
-  ;;
   --disable-vhost-user) vhost_user="no"
   ;;
   --enable-vhost-user) vhost_user="yes"
@@ -1170,7 +1167,6 @@ Advanced options (experts only):
   --with-coroutine=BACKEND coroutine backend. Supported options:
                            ucontext, sigaltstack, windows
   --enable-gcov            enable test coverage analysis with gcov
-  --tls-priority           default TLS protocol/cipher priority string
   --enable-plugins
                            enable plugins via shared library loading
   --disable-containers     don't use containers for cross-building
@@ -2201,7 +2197,6 @@ if test "$modules" = "yes"; then
   echo "CONFIG_STAMP=_$( (echo $qemu_version; echo $pkgversion; cat $0) | $shacmd - | cut -f1 -d\ )" >> $config_host_mak
   echo "CONFIG_MODULES=y" >> $config_host_mak
 fi
-echo "CONFIG_TLS_PRIORITY=\"$tls_priority\"" >> $config_host_mak
 
 if test "$vhost_scsi" = "yes" ; then
   echo "CONFIG_VHOST_SCSI=y" >> $config_host_mak