RDMA based migration has no dependence on libumad. libibverbs and
librdmacm are enough.
libumad was used by rdmacm-mux which has been already removed. It's
remained mistakenly.

Fixes: 1dfd42c4264b ("hw/rdma: Remove deprecated pvrdma device and rdmacm-mux helper")
Cc: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
---
 meson.build | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/meson.build b/meson.build
index ec59effca2..226b97ea26 100644
--- a/meson.build
+++ b/meson.build
@@ -1885,11 +1885,9 @@ endif
 
 rdma = not_found
 if not get_option('rdma').auto() or have_system
-  libumad = cc.find_library('ibumad', required: get_option('rdma'))
   rdma_libs = [cc.find_library('rdmacm', has_headers: ['rdma/rdma_cma.h'],
                                required: get_option('rdma')),
-               cc.find_library('ibverbs', required: get_option('rdma')),
-               libumad]
+               cc.find_library('ibverbs', required: get_option('rdma'))]
   rdma = declare_dependency(dependencies: rdma_libs)
   foreach lib: rdma_libs
     if not lib.found()
-- 
2.34.1