remove spurious MAP_32BIT definition from riscv64 arch

this was apparently copied from x86_64; it's not part of the kernel
API for riscv64. this change eliminates the need for a
riscv64-specific bits header and lets it use the generic one.

diff --git a/arch/riscv64/bits/mman.h b/arch/riscv64/bits/mman.h
deleted file mode 100644 (file)
index 3695057..0000000
--- a/arch/riscv64/bits/mman.h
+++ /dev/null
@@ -1 +0,0 @@
-#define MAP_32BIT       0x40