Add long name for floating point add and subtract

Author: ShashankVM

arch/inst/F/fadd.s.yaml

@@ -3,9 +3,10 @@
 $schema: "inst_schema.json#"
 kind: instruction
 name: fadd.s
-long_name: No synopsis available.
+long_name: Single-precision floating-point addition 
 description: |
-  Do the single-precision floating-point addition of fs1 and fs2 and store the result in fd. rm is the dynamic Rounding Mode.
+  Do the single-precision floating-point addition of fs1 and fs2 and store the result in fd. 
+  rm is the dynamic Rounding Mode. 
 definedBy: F
 assembly: fd, fs1, fs2, rm
 encoding:

arch/inst/F/fsub.s.yaml

@@ -3,9 +3,10 @@
 $schema: "inst_schema.json#"
 kind: instruction
 name: fsub.s
-long_name: No synopsis available.
+long_name: Single-precision floating-point subtraction
 description: |
-  Do the single-precision floating-point subtraction of fs2 from fs1 and store the result in fd. rm is the dynamic Rounding Mode.  
+  Do the single-precision floating-point subtraction of fs2 from fs1 and store the result in fd. 
+  rm is the dynamic Rounding Mode.  
 definedBy: F
 assembly: fd, fs1, fs2, rm
 encoding: