Add Zicfilp extension missing instructions

Signed-off-by: Afonso Oliveira <[email protected]>

arch/inst/Zicfilp/lpad.yaml

@@ -0,0 +1,24 @@
+# yaml-language-server: $schema=../../../schemas/inst_schema.json
+
+$schema: inst_schema.json#
+kind: instruction
+name: lpad
+long_name: No synopsis available.
+description: |
+      No description available.
+definedBy: Zicfilp
+assembly: imm
+encoding:
+  match: --------------------000000010111
+  variables:
+  - name: imm
+    location: 31-12
+    left_shift: 12
+access:
+  s: always
+  u: always
+  vs: always
+  vu: always
+data_independent_timing: false
+operation(): |
+