span: switch to std

Reduce the dependency on stdplus' version of span now that we are using
C++20 and use the one out of the STL instead.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I040ba1796d6f278353fbc990ea6b62314927951e
diff --git a/tools/p2a.cpp b/tools/p2a.cpp
index db8b75d..3cd641a 100644
--- a/tools/p2a.cpp
+++ b/tools/p2a.cpp
@@ -29,6 +29,7 @@
 #include <cstdint>
 #include <cstring>
 #include <memory>
+#include <span>
 #include <string>
 
 namespace host_tool
@@ -105,8 +106,8 @@
         bytesRead = sys->read(*inputFd, readBuffer.data(), readBuffer.size());
         if (bytesRead > 0)
         {
-            bridge->write(stdplus::span<const std::uint8_t>(readBuffer.data(),
-                                                            bytesRead));
+            bridge->write(
+                std::span<const std::uint8_t>(readBuffer.data(), bytesRead));
 
             /* Ok, so the data is staged, now send the blob write with the
              * details.