[WB] Update system source file

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

system/STM32WBxx/system_stm32wbxx.c

@@ -164,10 +164,12 @@
   const uint32_t MSIRangeTable[16UL] = {100000UL, 200000UL, 400000UL, 800000UL, 1000000UL, 2000000UL, \
                                       4000000UL, 8000000UL, 16000000UL, 24000000UL, 32000000UL, 48000000UL, 0UL, 0UL, 0UL, 0UL}; /* 0UL values are incorrect cases */
 
+#if defined(STM32WB55xx)
   const uint32_t SmpsPrescalerTable[4UL][6UL]={{1UL,3UL,2UL,2UL,1UL,2UL}, \
                                         {2UL,6UL,4UL,3UL,2UL,4UL}, \
                                         {4UL,12UL,8UL,6UL,4UL,8UL}, \
                                         {4UL,12UL,8UL,6UL,4UL,8UL}};
+#endif
 
 /**
   * @}