1nd Feb.,1997 : Sachin
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	VSERSTR.H : Increased MAX_SERIAL_RX_DESCRIPTORS to 32 from 16.

1nd Feb.,1997 : Sachin
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	SERRX.C : While checking for number of free rx descriptors, the ones
which are already with the serial controllers were not taken into account.
So introduces a new variable "actual_free".
	

SERIAL.68K
	21st July 1997 chetan
	made the initialization of IVT using the VBR i.e for SCC INTs
