Add the missing p.xx variant back to vector load/store ops

They are defined in the operation section, as well as in the toolchain ops and instrinsic header file

Change-Id: Iaff7c1bdee62266e4d9589c71e2a154e08200008

docs/kelvin_isa.md

diff --git a/docs/kelvin_isa.md b/docs/kelvin_isa.md
index 917aeec..9054d28 100644
--- a/docs/kelvin_isa.md
+++ b/docs/kelvin_isa.md
@@ -1229,7 +1229,7 @@
 **Encodings**
 
 vld.[b,h,w].{p}.x.{m} vd, xs1 \
-vld.[b,h,w].[l,s,lp,sp,tp].xx.{m} vd, xs1, xs2
+vld.[b,h,w].[l,p,s,lp,sp,tp].xx.{m} vd, xs1, xs2
 
 **Operation**
 
@@ -1926,7 +1926,7 @@
 **Encodings**
 
 vst.[b,h,w].{p}.x.{m} vd, xs1 \
-vst.[b,h,w].[l,s,lp,sp,tp].xx.{m} vd, xs1, xs2
+vst.[b,h,w].[l,p,s,lp,sp,tp].xx.{m} vd, xs1, xs2
 
 **Operation**