tests/avocado: use http for mipsdistros.mips.com

As the cached assets have fallen out of our cache new attempts to
fetch these binaries fail hard due to certificate expiry. It's hard
to find a contact email for the domain as the root page of mipsdistros
throws up some random XML. I suspect Amazon are merely the hosts.

The checksums should protect us from any man-in-the-middle type
attacks.

Message-Id: <20230503091244.1450613-22-alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Philippe Mathieu-Daudé <philmd@linaro.org>

tests/avocado/replay_kernel.py

@@ -493,7 +493,7 @@ def test_mips_malta32el_nanomips_4k(self):
         :avocado: tags=endian:little
         :avocado: tags=cpu:I7200
         """
-        kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
+        kernel_url = ('http://mipsdistros.mips.com/LinuxDistro/nanomips/'
                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
                       'generic_nano32r6el_page4k.xz')
         kernel_hash = '477456aafd2a0f1ddc9482727f20fe9575565dd6'
@@ -507,7 +507,7 @@ def test_mips_malta32el_nanomips_16k_up(self):
         :avocado: tags=endian:little
         :avocado: tags=cpu:I7200
         """
-        kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
+        kernel_url = ('http://mipsdistros.mips.com/LinuxDistro/nanomips/'
                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
                       'generic_nano32r6el_page16k_up.xz')
         kernel_hash = 'e882868f944c71c816e832e2303b7874d044a7bc'
@@ -521,7 +521,7 @@ def test_mips_malta32el_nanomips_64k_dbg(self):
         :avocado: tags=endian:little
         :avocado: tags=cpu:I7200
         """
-        kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
+        kernel_url = ('http://mipsdistros.mips.com/LinuxDistro/nanomips/'
                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
                       'generic_nano32r6el_page64k_dbg.xz')
         kernel_hash = '18d1c68f2e23429e266ca39ba5349ccd0aeb7180'