drivers/clock_control: fix: stm32wb series has only a single msi range

stm32wb only has a single msi clock range, in contrast to wl, l4, l5
which have a second range that is active after exit from standby mode.
This difference must be taken account of in the driver.

This commit abstracts __LL_RCC_CALC_MSI_FREQ macro such that all series
can be supported, additionally the switch to the msirange
(LL_RCC_MSI_EnableRangeSelection) is now only executed on series
that support it.

As a result stm32wb socs can use msi as sysclock.
The same should be done for stm32l0, but this commit series limits
the scope of socs to avoid getting too bloated.

Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>