Fix missing quotes around thunderx targets

cmake/prebuild.cmake

@@ -198,7 +198,7 @@ if (DEFINED CORE AND CMAKE_CROSSCOMPILING AND NOT (${HOST_OS} STREQUAL "WINDOWSS
     set(CGEMM_UNROLL_N 4)
     set(ZGEMM_UNROLL_M 8)
     set(ZGEMM_UNROLL_N 4)
-  elseif ("${CORE}" STREQUAL "THUNDERX)
+  elseif ("${CORE}" STREQUAL "THUNDERX")
     file(APPEND ${TARGET_CONF_TEMP}
       "#define L1_CODE_SIZE\t32768\n"
       "#define L1_CODE_LINESIZE\t64\n"
@@ -224,7 +224,7 @@ if (DEFINED CORE AND CMAKE_CROSSCOMPILING AND NOT (${HOST_OS} STREQUAL "WINDOWSS
     set(CGEMM_UNROLL_N 2)
     set(ZGEMM_UNROLL_M 2)
     set(ZGEMM_UNROLL_N 2)
-  elseif ("${CORE}" STREQUAL "THUNDERX2T99)
+  elseif ("${CORE}" STREQUAL "THUNDERX2T99")
     file(APPEND ${TARGET_CONF_TEMP}
       "#define L1_CODE_SIZE\t32768\n"
       "#define L1_CODE_LINESIZE\t64\n"