package/libgeos: use specific bug instead of BR2_nios2 to disable package

Let's use the _BUG_ form for disabling this package instead of BR2_nios2
architecture as we already use it for other packages.

Propagate this dependency to postgis. Also add the missing dependency on
bug 21464 to postgis.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Arnout:
 - put 27597 after 21464 instead of before it;
 - propagate dependency to postgis;
 - mention the bugs in the comments.
]
(cherry picked from commit 72eba37e520ede9277a7a84cde82be992eb5639d)
[Peter: drop postgis logic, not in 2021.02.x]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libgeos/Config.in

@@ -2,8 +2,8 @@ config BR2_PACKAGE_LIBGEOS
 	bool "libgeos"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR
-	depends on !BR2_nios2
 	depends on !BR2_TOOLCHAIN_HAS_BINUTILS_BUG_21464
+	depends on !BR2_TOOLCHAIN_HAS_BINUTILS_BUG_27597
 	help
 	  GEOS (Geometry Engine - Open Source) is a C++ port of the
 	  JTS Topology Suite (JTS). It aims to contain the complete
@@ -13,6 +13,7 @@ config BR2_PACKAGE_LIBGEOS
 
 	  https://trac.osgeo.org/geos
 
-comment "libgeos needs a toolchain w/ C++, wchar"
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR
-	depends on !BR2_nios2 || !BR2_TOOLCHAIN_HAS_BINUTILS_BUG_21464
+comment "libgeos needs a toolchain w/ C++, wchar, not binutils bug 21464, 27597"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR || \
+		   !BR2_TOOLCHAIN_HAS_BINUTILS_BUG_21464 || \
+		   !BR2_TOOLCHAIN_HAS_BINUTILS_BUG_27597