Updated SAI attribute details

doc/stp/MSTP_HLD.md

@@ -299,9 +299,7 @@ Following table shows the existing SAI Attributes that will be used:
 ||SAI_SWITCH_ATTR_MAX_STP_INSTANCE|
 
 ## New SAI Attributes
-MSTP design requires one new attribute `SAI_HOSTIF_TRAP_TYPE_MSTP` for control trap packets which will be defined in saihostif.h.
-
-[SAI/saihostif.h](https://github.com/opencomputeproject/SAI/blob/master/inc/saihostif.h)
+MSTP design will not require any new SAI Attributes for Control Packet trap. We will use the existing traps as DMAC and LLC fields are identical for STP and MSTP
 
 # Additional Features
 
@@ -819,4 +817,4 @@ User is expected to do a cold reboot when MSTP is running. If a user tries to pe
 # References
 1. [PVST HLD](https://github.com/sonic-net/SONiC/blob/master/doc/stp/SONiC_PVST_HLD.md)
 1. [IEEE 802.1Q-2018](https://standards.ieee.org/ieee/802.1Q/6844/)
-1. [IEEE 802.1s-2002](https://standards.ieee.org/ieee/802.1s/1042/)
+1. [IEEE 802.1s-2002](https://standards.ieee.org/ieee/802.1s/1042/)