Kernel patch is obsolete.

With revision 37569cd43f82bb54f9e621163c4b0eb662bd1a51 of the NOVA
kernel the patch isn't required anymore.

base-nova/patches/README

@@ -1,21 +1,2 @@
-This directory contains patches for the Nova Hypervisor prerelease 0.3
-
-:'utcb.patch':
-
-  It is not possible to destroy UTCBs in NOVA 0.3. Therefore UTCBs cannot be
-  re-used which may lead to the exhaustion of contexts within Genode. This patch
-  simply causes NOVA to ignore this issue.
-
-
-Applying the patches
---------------------
-
-To apply a patch to the NOVA hypervisor, use the 'patch' command. First check
-the directory given at the header of the patch. It may contain a directory
-prefix (such as 'a/'), which does not actually exist. This prefix is usually
-generated by the tool used to create the patch. In this case, use the '-p'
-option of the patch command. To apply the patch with the first part of the
-path stripped, issue the following command (make sure that you changed to
-the base directory of the NOVA hypervisor):
-
-! patch -p1 < /path/to/utcb.patch
+This directory contains patches for the NOVA microhypervisor @ github
+required for using this kernel with Genode.

base-nova/patches/utcb.patch

@@ -1,18 +0,0 @@
-diff -r 11c290b5edf9 src/syscall.cpp
---- a/src/syscall.cpp	Wed Nov 09 14:50:18 2011 +0100
-+++ b/src/syscall.cpp	Wed Nov 09 15:07:03 2011 +0100
-@@ -244,11 +244,13 @@
-     }
-     Pd *pd = static_cast<Pd *>(cap.obj());
- 
--    if (EXPECT_FALSE (r->utcb() >= USER_ADDR || r->utcb() & PAGE_MASK || !pd->insert_utcb (r->utcb()))) {
-+    if (EXPECT_FALSE (r->utcb() >= USER_ADDR || r->utcb() & PAGE_MASK)) {
-         trace (TRACE_ERROR, "%s: Invalid UTCB address (%#lx)", __func__, r->utcb());
-         sys_finish<Sys_regs::BAD_PAR>();
-     }
- 
-+    pd->insert_utcb (r->utcb());
-+
-     Ec *ec = new Ec (Pd::current, r->sel(), pd, r->flags() & 1 ? static_cast<void (*)()>(send_msg<ret_user_iret>) : nullptr, r->cpu(), r->evt(), r->utcb(), r->esp());
- 
-     if (!Space_obj::insert_root (ec)) {