[doc, sram_ctrl] Fix incorrect table values
[doc, sram_ctrl] Fix incorrect table values

In `prim_mubi_pkg.sv` and `multibits.h` `MuBi4True` value is 0xA,
whilst in the SRAM documentation it was set as 0x5, which corresponds
to `MuBi4False` of the above.

closes #8917

Signed-off-by: Silvestrs Timofejevs <5a6466a3751cccdb6ee413d1e87698ed8baaba81@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan