use linux/export.h rather than asm-generic/export.h

asm-generic/export.h is a wrapper for linux/export.h, with explicit request
to use linux/export.h directly.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20231214191922.GQ1674809@ZenIVSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/kernel/mcount-dyn.S

@@ -3,12 +3,12 @@
 
 #include <linux/init.h>
 #include <linux/linkage.h>
+#include <linux/export.h>
 #include <asm/asm.h>
 #include <asm/csr.h>
 #include <asm/unistd.h>
 #include <asm/thread_info.h>
 #include <asm/asm-offsets.h>
-#include <asm-generic/export.h>
 #include <asm/ftrace.h>
 
 	.text

arch/riscv/kernel/mcount.S

@@ -4,12 +4,12 @@
 #include <linux/init.h>
 #include <linux/linkage.h>
 #include <linux/cfi_types.h>
+#include <linux/export.h>
 #include <asm/asm.h>
 #include <asm/csr.h>
 #include <asm/unistd.h>
 #include <asm/thread_info.h>
 #include <asm/asm-offsets.h>
-#include <asm-generic/export.h>
 #include <asm/ftrace.h>
 
 	.text

arch/riscv/lib/clear_page.S

@@ -4,9 +4,9 @@
  */
 
 #include <linux/linkage.h>
+#include <linux/export.h>
 #include <asm/asm.h>
 #include <asm/alternative-macros.h>
-#include <asm-generic/export.h>
 #include <asm/hwcap.h>
 #include <asm/insn-def.h>
 #include <asm/page.h>

arch/riscv/lib/tishift.S

@@ -4,7 +4,7 @@
  */
 
 #include <linux/linkage.h>
-#include <asm-generic/export.h>
+#include <linux/export.h>
 
 SYM_FUNC_START(__lshrti3)
 	beqz	a2, .L1

arch/riscv/lib/uaccess.S

 #include <linux/linkage.h>
-#include <asm-generic/export.h>
+#include <linux/export.h>
 #include <asm/asm.h>
 #include <asm/asm-extable.h>
 #include <asm/csr.h>