Clean up spec (enable LTO)

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

ghc.spec

@@ -11,10 +11,6 @@
 # build hadrian for production builds:
 %bcond build_hadrian 1
 
-%ifarch riscv64
-%global _lto_cflags %{nil}
-%endif
-
 # disabled to allow parallel install of ghc9.2-9.2.7 and ghc-9.2.6
 %if 0
 %global ghc_major 9.2
@@ -483,7 +479,7 @@ rm libffi-tarballs/libffi-*.tar.gz
 %patch -P27 -p1 -b .orig
 
 # newer LLVM versions
-%patch30 -p1 -b .orig
+%patch -P30 -p1 -b .orig
 
 %if %{with haddock} && %{without hadrian}
 %global gen_contents_index gen_contents_index.orig
@@ -1024,7 +1020,6 @@ env -C %{ghc_html_libraries_dir} ./gen_contents_index
 * Fri Jun 23 2023 David Abdurachmanov <davidlt@rivosinc.com> - 9.2.6-131.0.riscv64
 - Change LLVM from 12 to 13
 - Move riscv64 to LLVM arch
-- Disable LTO on riscv64 to speed up builds
 - Disable ld.gold on riscv64 (not supported)
 
 * Thu May 25 2023 Jens Petersen <petersen@redhat.com> - 9.2.6-131