riscv: remove unused field range for CSR field enum

Removes the unused field range arguments from the CSR field enum helper
macro.

Author: rmsyn

riscv/src/register/macros.rs

@@ -668,7 +668,6 @@ macro_rules! csr {
 macro_rules! csr_field_enum {
     ($(#[$field_ty_doc:meta])*
      $field_ty:ident {
-         range: [$field_start:literal : $field_end:literal],
          default: $default_variant:ident,
          $($variant:ident = $value:expr$(,)?)+
      }$(,)?

riscv/src/register/tests/read_only_csr.rs

@@ -27,7 +27,6 @@ read_only_csr_field! {
 csr_field_enum! {
     /// field enum type with valid field variants
     MtestFieldEnum {
-        range: [8:11],
         default: Field1,
         Field1 = 1,
         Field2 = 2,

riscv/src/register/tests/read_write_csr.rs

@@ -27,7 +27,6 @@ read_write_csr_field! {
 csr_field_enum! {
     /// field enum type with valid field variants
     MtestFieldEnum {
-        range: [8:11],
         default: Field1,
         Field1 = 1,
         Field2 = 2,

riscv/src/register/tests/write_only_csr.rs

@@ -27,7 +27,6 @@ write_only_csr_field! {
 csr_field_enum! {
     /// field enum type with valid field variants
     MtestFieldEnum {
-        range: [8:11],
         default: Field1,
         Field1 = 1,
         Field2 = 2,