Drop the <TBD> descriptions which seemingly break SVDConv

Use the string "No Description." instead.

Reported-by: @Gasman2014
Ref: #27 (comment)

src/svd/field.rs

@@ -12,7 +12,7 @@ pub fn generate(f: &chip::Field) -> crate::Result<xmltree::Element> {
             desc.as_ref()
         } else {
             log::warn!("Description missing for field {:?}", f.name);
-            "<TBD>"
+            "No Description."
         },
     );
     el.child_with_text("bitRange", format!("[{}:{}]", f.range.1, f.range.0));

src/svd/interrupt.rs

@@ -26,7 +26,7 @@ pub fn generate(peripherals: &mut xmltree::Element, c: &chip::Chip) -> crate::Re
                         desc.as_ref()
                     } else {
                         log::warn!("Description missing for field {:?}", interrupt.name);
-                        "<TBD>"
+                        "No Description."
                     },
                 );
 

src/svd/peripheral.rs

@@ -44,7 +44,7 @@ pub fn generate(p: &chip::Peripheral) -> crate::Result<xmltree::Element> {
             desc.as_ref()
         } else {
             log::warn!("Description missing for peripheral {:?}", p.name);
-            "<TBD>"
+            "No Description."
         },
     );
     el.child_with_text("baseAddress", format!("0x{:X}", base));

src/svd/register.rs

@@ -12,7 +12,7 @@ pub fn generate(r: &chip::Register, base: usize) -> crate::Result<xmltree::Eleme
             desc.as_ref()
         } else {
             log::warn!("Description missing for register {:?}", r.name);
-            "<TBD>"
+            "No Description."
         },
     );
     el.child_with_text("addressOffset", format!("0x{:X}", r.address - base));

src/svd/restriction.rs

@@ -60,7 +60,7 @@ pub fn generate_enumerated(e: &chip::EnumeratedValue) -> crate::Result<xmltree::
             desc.as_ref()
         } else {
             log::warn!("Description missing for enumeratedValue {:?}", e.name);
-            "<TBD>"
+            "No Description."
         },
     );
     el.child_with_text("value", e.value.to_string());