Apply suggestions from code review

Co-authored-by: Ved Shanbhogue <91900059+ved-rivos@users.noreply.github.com>
Signed-off-by: Kito Cheng <kito.cheng@gmail.com>

riscv-elf.adoc

@@ -1355,12 +1355,12 @@ a different features.
 
 `GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP` This bit indicate the program has built
 with landing pad (`Zicfilp` extension), executable or shared libary tag with
-this bit should generate PLT with landing pad.
+`GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP` This bit indicate that all executable sections are built to be compatible with the landing pad mechanism provided by the `Zicfilp` extension. An executable or shared library with this bit set is required to generate PLTs with the landing pad (`lpad`) instruction.
 
 `GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS`: This bit indicate the program has built
 with shadow stack (`Zicfiss` extension), executable or shared libary tag with
 this bit will require execution environment at least has implement the
-instructions that defined in `Zimop` extension.
+`GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS`: This bit indicate that all executable sections are built to be compatible with the shadow stack mechanism provided by the `Zicfiss` extension. Loading an executable or shared library with this bit set requires the execution environment to provide either the `Zicfiss` extension or the `Zimop` extension. When the executable or shared library is compiled with compressed instructions then loading an executable with this bit set requires the execution environment to provide the `Zicfiss` extension or to provide both the `Zcmop` and `Zimop` extensions.
 
 === Mapping Symbol