Sprinkle `const` around where appropriate (#1909)

* Sprinkle `const` around where appropriate

- This will make it easier to use `NDS` objects in `const` contexts (e.g. `const` parameters or methods)

* Remove the `const` qualifier on `DSi_DSP::DSPRead16`

- MMIO reads can be non-pure, so this may not be `const` in the future

1 files changed, 1 insertions, 1 deletions

diff --git a/src/DSi_SPI_TSC.h b/src/DSi_SPI_TSC.h
index 47777da..d1a7106 100644
--- a/src/DSi_SPI_TSC.h
+++ b/src/DSi_SPI_TSC.h
@@ -40,7 +40,7 @@ public:
     void SetMode(u8 mode);
 
     void SetTouchCoords(u16 x, u16 y) override;
-    void MicInputFrame(s16* data, int samples) override;
+    void MicInputFrame(const s16* data, int samples) override;
 
     void Write(u8 val) override;
     void Release() override;