Fix broken links to auth-framework.rst

The file has been moved to a `design` subdirectory. Update the
path in two places.

Signed-off-by: Sean Gilligan <sean@msgilligan.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
diff --git a/architecture/porting_guidelines.rst b/architecture/porting_guidelines.rst
index 863e9a2..606bd80 100644
--- a/architecture/porting_guidelines.rst
+++ b/architecture/porting_guidelines.rst
@@ -431,7 +431,7 @@
 .. _core/include/kernel/tee_common_otp.h: https://github.com/OP-TEE/optee_os/blob/master/core/include/kernel/tee_common_otp.h
 
 
-.. _auth-framework.rst: https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/auth-framework.rst
+.. _auth-framework.rst: https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/design/auth-framework.rst
 .. _HSM: https://en.wikipedia.org/wiki/Hardware_security_module
 .. _MAINTAINERS.md: https://github.com/OP-TEE/optee_os/blob/master/MAINTAINERS
 .. _OTP: https://en.wikipedia.org/wiki/Programmable_read-only_memory
diff --git a/building/devices/rpi3.rst b/building/devices/rpi3.rst
index 89dd347..b0504a6 100644
--- a/building/devices/rpi3.rst
+++ b/building/devices/rpi3.rst
@@ -674,7 +674,7 @@
 you can debug using normal GDB commands.
 
 
-.. _`Authentication Framework`: https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/auth-framework.rst
+.. _`Authentication Framework`: https://github.com/ARM-software/arm-trusted-firmware/blob/master/docs/design/auth-framework.rst
 .. _Bus Blaster: http://dangerousprototypes.com/docs/Bus_Blaster
 .. _core team: https://github.com/orgs/OP-TEE/teams/linaro/members
 .. _eBay: https://www.ebay.com/sch/i.html?&_nkw=UART+cable