Remove gating on target architecture in math.rs

Provide math builtins for every "none" target instead of gating on specific
architectures, with exception being soft floating point functions to
avoid double declarations

src/math.rs

@@ -23,7 +23,7 @@ macro_rules! no_mangle {
     ),
     target_os = "xous",
     target_os = "uefi",
-    all(target_arch = "xtensa", target_os = "none"),
+    target_os = "none",
     all(target_vendor = "fortanix", target_env = "sgx")
 ))]
 no_mangle! {
@@ -95,7 +95,7 @@ no_mangle! {
     ),
     target_os = "xous",
     target_os = "uefi",
-    all(target_arch = "xtensa", target_os = "none"),
+    target_os = "none",
     all(target_vendor = "fortanix", target_env = "sgx"),
     target_os = "windows"
 ))]
@@ -113,19 +113,15 @@ intrinsics! {
     }
 }
 
-#[cfg(any(
-    target_os = "xous",
-    target_os = "uefi",
-    all(target_arch = "xtensa", target_os = "none"),
-))]
+#[cfg(any(target_os = "xous", target_os = "uefi", target_os = "none",))]
 no_mangle! {
     fn sqrtf(x: f32) -> f32;
     fn sqrt(x: f64) -> f64;
 }
 
 #[cfg(any(
     all(target_vendor = "fortanix", target_env = "sgx"),
-    all(target_arch = "xtensa", target_os = "none"),
+    target_os = "none",
     target_os = "xous",
     target_os = "uefi"
 ))]