rustsbi-qemu: reduce binary size by align SBI segments to 4 bytes

SBI implementations does not need to align by 4K as it cannot use paged memory; that requirement should be met by kernels instead.

Signed-off-by: luojia65 <me@luojia.cc>

Author: luojia65

rustsbi-qemu/src/linker64.ld

@@ -13,23 +13,23 @@ SECTIONS
         *(.text .text.*)
     }
 
-    . = ALIGN(4K);
+    . = ALIGN(4);
     etext = .;
     srodata = .;
     .rodata : {
         *(.rodata .rodata.*)
         *(.srodata .srodata.*)
     }
 
-    . = ALIGN(4K);
+    . = ALIGN(4);
     erodata = .;
     sdata = .;
     .data : {
         *(.data .data.*)
         *(.sdata .sdata.*)
     }
 
-    . = ALIGN(4K);
+    . = ALIGN(4);
     edata = .;
     .bss : {
         *(.bss.uninit)
@@ -38,7 +38,7 @@ SECTIONS
         *(.sbss .sbss.*)
     }
 
-    . = ALIGN(4K);
+    . = ALIGN(4);
     ebss = .;
     ekernel = .;